if it helps any, eliminate ammonia and nitrite testing from any brand. to buy the kits is to waste money
reason: nitrite no longer factors in display tank reefing we don't care what it reads, no condition will make it lethal or impactful in display tank reefing specifically. ammonia is predictable at all times, perhaps the most predicable parameter in reefing because once cycled, all display reefs run an incredibly tight range of ammonia control, a few thousandths ppm max variance nh3, and only a full fish kill left to rot can undo that condition. you don't need anyone's ammonia meter to look and see if all the fish are still swimming. ammonia cannot rise before a fish kill event in normal runnings, it can only rise after one and after sufficient time left in tank to rot. ammonia is the most predictable parameter in all of reefing and we don't even need to test for it during cycles, those can be predetermined by # of days underwater for the cycling setup.
your filter bacteria were first to come (within a predetermined wait time already known for any system) and are last to go; any rising ammonia is a dead carcass or someone dumped in a ton of feed- that's the rule. you can literally see both causes of reef tank ammonia noncontrol without a test kit
the only reason to own an ammonia meter is to make cycling proofs with one; they're not actually needed to run reefs.
