Korallen-Zucht ZEOzym – 500 gm

ZEOzym by Korallen-Zucht is an enzyme-based stimulant that boosts bacterial metabolism and skimmer performance while controlling slime algae.

Enzyme-based biological stimulant to promote increased bacterial metabolism.

• Amplifies the effect of ZEObak.
• Stimulates the biological control of slime algae (Cyanobacteria).
• Enhances skimming performance.
• Disbarment of harmful substances.
• Improves coral growth enormously.

Dissolve separately 6-8 hours advanced in 0.5 l tank water, and then add directly to the tank. Carefully observe the protein skimmer for increased skimmate production.

Dosing:
Normal: 1 level teaspoon per 1000 L / 250 gallons per week dissolved in tank water.

As a solution to excess organics:
Up to 2 level teaspoons daily.
Unit: 250g/500g

Part of managing nitrate and phosphate levels — see our guide to Nitrate & Phosphate for why these two parameters are tracked together.

Compatibility

What it is. KZ's catalogue: an enzyme-based biological stimulant. It amplifies the effect of bacteria such as ZEObak and Bio-Mate, helps with slime algae problems, enhances skimming performance, breaks down harmful substances, and improves the growth of corals and biomass.

Where this sits in the Korallen-Zucht range. KZ build everything around four basis products — ZEOvit zeolite media, ZEObak, ZEOfood and ZEOstart — which together are the ZEOvit system. Everything else in the range, this product included, is a layer on top: colour products, problem solvers, and single elements. KZ's own guidance is that the products can each be used separately, without the complete ZEOvit system and without the other KZ products, but that the full effect in quality and colouration comes only from running the system.

It is a multiplier for the bacterial products — ZEObak and Bio-Mate — rather than something that does the job alone.

Bulk Reef Supply pair it with Coral Snow and CyanoClean against red slime algae.

No ozone and no UV while you are running the ZEOvit system. That is KZ's instruction, and the reason is the point of the system: ozone and UV destroy the microorganisms and elements the whole method depends on.

KZ's own target water parameters, for any tank running their products: calcium 400–410 mg/L, magnesium 1,260–1,280 mg/L, carbonate hardness 6.5–8, potassium 380–400 mg/L, salinity 33–35 ppt. They add a warning worth repeating: higher figures bring no advantage. Neither growth nor colouration in SPS corals is improved by pushing past these, and higher levels tend to have negative effects.

Dosage & Directions

Korallen-Zucht's own dose. 1 dosing spoon per 1,000 litres, weekly.

How and where it goes in. Dissolve it separately first. KZ's instruction: dissolve the spoonful in about half a litre of tank water 6 to 8 hours in advance, then add that to the tank. Bulk Reef Supply ask you to watch the skimmer closely while it works.

Start below the figure, not at it. KZ's own instruction for a first-time user, a lightly stocked tank, or a tank with little growth: reduce the dosage recommendation and adjust upward. Their words — do not act on the principle that the more the merrier.

Calculate on gross volume. KZ ask you to use the gross water amount for dosing arithmetic, not a net figure with rock and sand deducted.

Freshness & Storage

Every batch we dispatch carries a minimum of 6 months' remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.

Backorder & Dispatch Timeline

This item is stocked to order. Back-orders are consolidated and placed with our overseas suppliers once a month, on the last day of the month, and all such orders are shipped before the 15th of the following month.

Back-orders cannot be cancelled once they have been placed with the supplier. If you cancel before that, payment-gateway charges of 2% plus GST are deducted and the balance refunded. In the rare case a supplier cannot fulfil the item, we will offer you an alternative first, and refund in full with no deduction if you would rather not take it.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.