Not all marine aquarium keepers stock corals alongside their fish, and with this in mind, JBL is now offering a dedicated small test kit set — the JBL Test CombiSet Marin — for marine aquarists who keep a lot of fish.
Along with the essential carbonate hardness and the pH value ammonium/ammonia (toxic nitrogen compound), nitrite (fish poison), nitrate and phosphate (algae nutrients) can be measured precisely and quickly. All the tests can be purchased separately as refills.
What makes these JBL water tests special is that they are especially easy to read thanks to a comparator system which even takes a possible intrinsic water colouration into account.