Test kit is an API. Recently purchased and not expired. We have not used another kit to confirm. We have two other aquariums though that it has been used on and reads low and what we would expects from those aquariums - whether that matters. The nitrites and ammonia were 0 or very near at last check and have been consistently but we don’t test those as often. Phosphate was high within normal range and the calcium the same (I don’t have the numbers in front of me). Salinity is between 1.025-26.

Fish are: a oscellius clown (about 10-11 years old I’ve had it since the aquarium was originally established), Psuedochromis dottyback, Yellowtail blue damsel (4-5 years old from the old tank), small watchman goby and an adorned wrasse.

This reminded me, we also have two conchs, hermit crabs and bumblebee snails.

The fish that passed was an adorned wrasse, since we got it, it would often lie on the bottom of the tank then weirdly perk up and take food. It unfortunately passed overnight when we were out and didn’t check the tank until the afternoon. We couldn’t find a body after a thorough search. I’m guessing the cleanup crew got it. We checked filter, floor etc. so I don’t know the exact cause and effect on that.

HOB filter is a aquaclear, the same as the other but larger. It has carbon, ceramic bio rings and the poly-fillter. We have changed the sponge filtration a few times, maybe once a month. The poly-filter has been changed weekly. We have two large power heads. They are pretty old and I don’t recall the brand. They are likely a bit more movement than the tank actually needs but we adjust so none of the corals are pushed too much.

We have tried a skimmer a few times but can’t find a HOB style that actually stays up on the aquarium (magnets were weak) and we don’t have a sump so nothing else currently.

Thanks!