when I was a importer,Whole sale and retail. Saltwater,Freshwater,reptiles and amphibians. We checked water parameters every 12 hrs. at my place. Now that I'm retired and I have 11 tanks running 3 ponds and a turtle pool, I don't bother. I check copper and salinity. My water changes are frequent. I have one back up 55gal aged and running all the time just in case. I do use protein skimmers and uv
steralisers. I spend seventy percent of my time in my fish room. I don't need test kits any more to tell me what is going on in my tanks .My anemone and shrimp. Coral banded and camel backs and anemone,will alert me to a water problem before the fish will. I'm glad to say haven't had any water problems just fish compatability problems,and this always happens after the fish grow up. I am in the process of releasing back in the ocean 3 unicorn tangs 1 convict tang and 1 sergeant major,They have out grown the 125.Always a sad time to let my babies go. Fish that you grew up from babies to almost adult hood.It takes a lot of prep. to release them back. I have to convert them back to natural seawater takes about 50 gal
seawater kept in the dark run through micronfilters and carbon heavy aeration before I use it. The fish get released at a popular snorkeling site since these fish are use to people. I think its good for the fish. Especialy because there is no fishing right there .