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Coarse bait · Groundbait · Our take
Dynamite Baits Swim Stim Betaine Green Groundbait
Betaine Green · 900g
A versatile, fishmeal-rich groundbait for commercial carp, F1s, bream and skimmers, with a subtle green finish for clearer venues.
- 900g pack of Betaine Green groundbait
- Based on Dynamite Baits’ Koi Technology Formula with fishmeal
- Contains a betaine additive to attract fish and stimulate feeding
- Suitable for carp, F1s, bream and skimmers on commercial fisheries
Make sure it’s the right one. This review covers Dynamite Baits Swim Stim Betaine Green Groundbait in the 900g pack, not the other Swim Stim colours or ready-made mixes.
Tackle Index Score
Tackle Index score
A very capable commercial groundbait with strong versatility and a sensible clearer-water colour.
Desk-research score from specs, price and fishing fit · How we score
- Product Quality9/10
- Performance8.9/10
- Impact on Fish Catching8.8/10
- Ease of Use9.2/10
- Value for Money8.5/10
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Who it suits
Is it right for you?
Great for
- Commercial match anglers. It covers carp, F1s, bream and skimmers, with enough flexibility to switch between feeder, float and paste tactics.
- Anglers fishing clearer commercial lakes. The green colour is intended to blend into the lakebed instead of creating an obvious pale or bright patch.
Maybe skip if
- Anglers fishing very silty or dark venues. The green shade is aimed at clearer water, so another colour may look more natural on a dark bottom.
- Anyone wanting a totally neutral, low-food mix. The fishmeal and betaine make this a more active commercial-fish bait than a plain carrying groundbait.
The lowdown
Introducing the Dynamite Baits Swim Stim Betaine Green Groundbait
A versatile, fishmeal-rich groundbait for commercial carp, F1s, bream and skimmers, with a subtle green finish for clearer venues.
- 900g pack of Betaine Green groundbait
- Based on Dynamite Baits’ Koi Technology Formula with fishmeal
- Contains a betaine additive to attract fish and stimulate feeding
- Suitable for carp, F1s, bream and skimmers on commercial fisheries
Quick verdict
A proper all-round commercial mix
Swim Stim Betaine Green is a cracking choice when you need one groundbait to cover feeder work, cupping, balling and paste. The fishmeal, betaine additive and Koi Technology Formula give it plenty of appeal without turning your swim into a dinner plate.
It’s especially handy on clearer commercial lakes, where the green colour should blend into the lakebed rather than looking like a big bright patch. Not the cheapest-looking option if you only want a basic carrier mix, but it’s a very flexible bag to have in the box.
A very capable commercial groundbait with strong versatility and a sensible clearer-water colour.
Desk-research score from specs, price and fishing fit · How we score
- Product Quality
- 9/10
- Performance
- 8.9/10
- Impact on Fish Catching
- 8.8/10
- Ease of Use
- 9.2/10
- Value for Money
- 8.5/10
The Koi Technology Formula, fishmeal and betaine give it a well-defined commercial-bait package.
It is designed to attract, stimulate feeding and hold fish without overfeeding, while working across several presentations.
Carp, F1s, bream and skimmers are all realistic targets, especially on commercial fisheries.
It is easy to mix and can be used in a feeder, cupped in, balled in or turned into paste.
The versatility is strong, though heavy balling or multiple feed lines could use up the 900g bag fairly quickly.
Head to head
How it stacks up
Side by side with the closest kit we've reviewed. This updates as we add more reviews.
Dynamite Baits
Dynamite Baits Swim Stim Betaine Green Groundbait (this one)
Top scorer
Top scorer
Scores are our own, out of 10. Best in each row is in green. Prices change, so check the latest before you buy.
The full rundown
Everything you'll want to know about the Dynamite Baits Swim Stim Betaine Green Groundbait
There’s a lot to like about a groundbait that doesn’t make you pick one tactic before you’ve even clipped up. Dynamite Baits Swim Stim Betaine Green is built for that sort of fishing. One bag can cover feeder work, cupping, balling and paste, which is proper handy when the swim starts throwing you a few curveballs.
The colour is the first thing you’ll notice. This Betaine Green version is aimed at clearer commercial lakes, where a green mix should sit more naturally against the bottom. That matters when carp and F1s are feeding confidently but can still be a bit suspicious of a glaring patch of pale bait.
Underneath the colour, you’ve got Dynamite Baits’ Koi Technology Formula, with fishmeal and a betaine additive in the mix. That points it firmly towards commercial fish rather than shy, ultra-natural river fishing. Carp, F1s, bream and skimmers are the intended crowd, and that’s a useful spread for a typical match lake.
The fishmeal gives it a savoury, fishy edge that commercial carp generally understand pretty quickly. Betain is there to help attract fish and stimulate feeding, while the mix is designed to hold them without simply piling loads of food on the deck. That balance is handy when you want bites rather than a swim full of uneaten grub.
For feeder anglers, it’s a straightforward option. Get it mixed so it binds around the method or open-end feeder, depending on what the swim wants, and you can build a little food trail without turning the bottom into concrete. Keep it a touch looser when you want it to break down and draw fish through the peg.
It’s not tied to the feeder, though. You can cup it in when you’re fishing a line for F1s, ball it around a float line or work it into paste for a more direct presentation. That gives you a proper escape route if the fish change their minds. One minute they might want a neat little feed line; the next, they’re on the munch over a soft paste offering.
The green colour makes most sense in clearer water, particularly on commercial lakes with a fairly natural-looking bottom. It should blend better than a bright yellow or pale mix, so you’re not putting down a dinner-table-sized target that looks out of place. On a very dark or heavily coloured lakebed, you might fancy a different shade instead.
The 900g bag is a sensible size for a session, but remember how quickly groundbait can vanish when you’re balling in or feeding several lines. For a tight feeder approach, it’ll go a fair way. For a match where you’re building multiple swims, it’s worth planning your mix and not getting too enthusiastic with the first few pots.
Mixing should be refreshingly faff-free. Start with less water than you think you need, give it time to draw through, then add small amounts until it binds how you want. Riddle it if you’re chasing a really tidy texture, and don’t be scared to tweak the consistency between a feeder line and a cupped-in float line. The end result is a versatile, commercial-focused groundbait with enough food signal to get noticed, but without shouting quite as loudly as some highly coloured mixes.
Specifications
The nuts and bolts
- Product
- Dynamite Baits Swim Stim Betaine Green Groundbait
- Pack weight
- 900g
- Colour and flavour
- Betaine Green
- Base
- Dynamite Baits Koi Technology Formula
- Key ingredients
- Fishmeal and betaine additive
- Use
- Feeder, cupped in, balled in or mixed into paste
Specs checked with Dynamite Baits, Oct 2026.
Spot a model or spec change?
Our take
Why the green version makes sense
This is the version to reach for when the water’s reasonably clear and you want your feed to sit naturally on the bottom. It’s aimed squarely at commercial carp and F1 fishing, but bream and skimmers won’t be left out either.
The real draw is versatility. You can mix it for a feeder, cup it in, ball it around a float line or push it towards a paste-style consistency. That makes it useful for match anglers who need to change gears without carrying half the bait shop.
What you’re buying
A flexible fishmeal-based commercial mix
Swim Stim Betaine Green is a 900g groundbait based on Dynamite Baits’ Koi Technology Formula. It contains fishmeal and a betaine additive, giving it a clear commercial-fish identity. The target list is broad enough for carp, F1s, bream and skimmers.
The main attraction is how many jobs it can do. Mix it for a feeder, cup it in, form it into balls or add more water and use it as paste. That’s a proper bonus when you’re moving between methods or trying to keep a match plan flexible.
The green colour is designed for clearer water, where it should blend with the lakebed. It’s a more subtle look than a bright, high-contrast mix, which can be useful when fish are feeding in open water or over a clean bottom.
Worth knowing. The fishmeal and betaine make this an active commercial bait, not a bland carrier. That’s great when carp and F1s are feeding, but you’ll want to adjust how much you feed if the water is cold or the fish are showing signs of being finicky.
On the bank
Made for commercial tactics
Match anglers get the most from this mix because it can follow the fish. Start with a feeder, switch to a cupped-in line or add paste when the response changes. You’re not locked into one presentation, and that can save a blank day when the obvious line goes a bit quiet.
It also suits pleasure anglers who want one bag that covers several jobs. A small amount around a float line, a feeder full on a far bank shelf or a few balls down the edge can all come from the same mix.
Use a slightly firmer mix when you need it to reach the bottom intact, or loosen it when you want quicker breakdown. With paste, keep the texture controlled and avoid making a sloppy cloud unless the venue and fish are clearly asking for it.
Worth knowing. The green version is most at home in clearer commercial water. If your venue is very dark, silty or heavily stained, a different colour may sit more naturally on the bottom.
Quick answers
The stuff you’ll want to know
Can it be used for F1s? Yes. F1s are one of the key targets, particularly when you’re fishing a controlled feed line with a float, short feeder or paste approach. Keep the feed measured and let the fish tell you when to top up.
Is it only for carp? Not at all. Carp are a major part of the intended audience, but bream and skimmers can also be targeted with it. That makes it a useful all-round commercial mix rather than a one-species bait.
Does it work in a feeder? Yes. It’s designed to be used in a feeder, as well as balled or cupped in. The key is getting the water level right for the feeder type and the amount of breakdown you want.
Worth knowing. Build the mix gradually. Add water in stages, allow it to settle, then check the squeeze and breakdown before committing it to the swim. That little bit of patience can make the difference between a neat feed cloud and a stodgy lump.
On paper
Pros & cons
What we like
- Proper versatile: feeder, cup, balls or paste are all on the menu.
- Green colour blends nicely with the lakebed in clearer water.
- Fishmeal and betaine give it plenty of commercial-fish appeal.
- Designed to encourage feeding without overloading the swim.
- Easy to mix and suitable for several common match targets.
Worth knowing
- The fishmeal content won’t suit every venue or every cool-water situation.
- A 900g bag can disappear quickly if you’re balling heavily or fishing a busy session.
- It’s more specialised than a plain, neutral groundbait for wild mixed fisheries.
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Your questions answered
What anglers want to know
The stuff you’d ask your mate on the next peg. Straight answers, no waffle.
01What fish is Dynamite Baits Swim Stim Betaine Green aimed at?
What fish is Dynamite Baits Swim Stim Betaine Green aimed at?
It’s designed mainly for commercial-fish targets including carp and F1s, but bream and skimmers are well within its wheelhouse too.
02How can you use this groundbait?
How can you use this groundbait?
Mix it for a feeder, cup it into a swim, form it into balls or add water until it works as a paste. That gives you plenty of options through a match or pleasure session.
03Is the green colour best for clear water?
Is the green colour best for clear water?
Yes. The green shade is suited to clearer water and is intended to blend with the lakebed, making it a sensible choice when you don’t want a contrasting patch of feed.
What anglers say
The word from the bank
Our read: a proper all-round commercial mix. The strongest reasons to choose it are proper versatile: feeder, cup, balls or paste are all on the menu. and green colour blends nicely with the lakebed in clearer water.; the main trade-off is the fishmeal content won’t suit every venue or every cool-water situation..
Our take on the feedback
Why it appeals
Checked Sept '26 — “Proper versatile: feeder, cup, balls or paste are all on the menu.”
Best fit
Checked Sept '26 — “Commercial match anglers: It covers carp, F1s, bream and skimmers, with enough flexibility to switch between feeder, float and paste tactics.”
Worth knowing
Checked Sept '26 — “The fishmeal content won’t suit every venue or every cool-water situation.”
Tackle Index’s take from the product details and fishing fit we checked. We haven’t found enough independent public feedback to call this an angler consensus yet.
Angler score
What our readers rate Dynamite Baits Swim Stim Betaine Green Groundbait
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