Api Stress Zyme 30ml
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STRESS ZYME adds beneficial bacteria to break down and consume organic matter to help keep the aquarium clean. The bacteria in STRESS ZYME is uniquely suited to consume aquarium sludge, and keep the gravel clean. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. These bacteria improve the development of the biological filter and help clean a dirty aquarium. Making STRESS ZYME a part of regular care assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. For use in fresh and saltwater.
Healthier fish and good water quality.
These bacteria improve the development of the biological filter and help clean a dirty aquarium.
The bacteria in STRESS ZYME is uniquely suited to consume aquarium sludge.
Click & Collect
Free, ready in 1 hour, available at all Jollyes stores
Order online, collect from your nearest store in as little as one hour. Free on every order, every time.
Zoomies 2 hour home delivery.
Available to customers in 5 mile radius of store from £3.50.
Order between store opening and closing times and get your pets essentials delivered immediately.
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Standard delivery
Free on orders over £45 ·
£3.50 on orders £10–£39.99
£5.49 under £10
Delivered in 3–5 working days from dispatch via DPD. You'll receive a tracking link from DPD once your order has left us. Mainland UK only — additional charges apply for Northern Ireland, Scottish Highlands, Isle of Wight, Isle of Man and Channel Islands (from £13.99).
Express delivery
Delivery cost £4.00
£7.49 on orders under £10
Delivered in 1–3 working days from dispatch. Same pricing structure as standard — choose at checkout if you need it faster
Dispatch & tracking
Orders are typically dispatched within 1–3 working days. During busy periods this may extend to 5 working days. Track your order via the DPD link in your dispatch confirmation email.
Returns & refunds
Return within 30 days in original, unused condition — in store for free or by post. Faulty or incorrect items are refunded in full including delivery. Veterinary medicines, used food, raw/frozen food and personalised products cannot be returned. Full details at Returns & refunds