API® STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle.
Making STRESS ZYME bacterial cleaner part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums.
30mL bottle treats up to 227L, 118ml up to 893L, 237ml up to 1,794L
Shake bottle before use.
*if dosing in saltwater aquariums, it is not recommended for use with a protein skimmer
Dosage: 5 mL per 38 L of aquarium water.
Use at every water change, during filter maintenance or filtration media replacements.
Dose weekly to support the natural biological health of your aquarium.
For new aquariums:
Day 1 add double the dose to 10ml per 38L, repeat on Day 7 and Day 14 before moving to the standard maintenance dose rate.
Store in it's closed container in a dry and cool area. Always follow the instructions on the product label for safe and effective use.
All orders are dispatched from Petdirect’s Auckland and Christchurch warehouses, offering fast, reliable delivery throughout New Zealand.
Free shipping on orders $79.00 and over
Flat $5.90 delivery for smaller orders
This is ideal for urgent pet supply needs within the Auckland and Christchurch regions.
Available in eligible Auckland and Christchurch suburbs only.
See our shipping & delivery page for more information
You have 30 days to return products in original condition if you change your mind. Courier costs apply for change-of-mind returns.
If we made a mistake or your order is faulty or damaged, we’ll make it right — and cover the return shipping.
In-person returns are welcome at our Auckland store or Christchurch warehouse (by appointment).
See our full returns & refunds policy for more detail