90g fowler, 4 fish. I don't use a sump, just Octopus skimmer and weekly 5% PWCs.
My nitrate went from it's consistent level of 5-10ppm to close to 40ppm.
I did have a green chromis disappear a week or so ago but no measurable Amm. or Nitrite recently. SG
and PH values read consistent levels.
I noted the nitrate level, and did a PWC
as I normally would. This lowered the level to about 20ppm and it appears to be staying at that level.
Should I do a larger PWC
or continue with my usual PWC
I'm confident the fish will be okay but am a little worried about my inverts.