I will just share my experience as to the "Case of missing fishes". I started my planted tank last October, and till now, I have 5 casualties, 2 Oto and 3 cherry barb. You mentioned that you have 3 sucker fishes which I assume to be Oto. My 2 Oto died stuck at the filter head, so you should check whether they have been sucked into your filter. If they are, then they should be well decomposed by now. I sometimes also did not see my remaining Oto for quite some days only to see them hiding below the drift wood.
You should check below the drift wood, filter, stones (rocks) for any dead fish bodies, as they maybe stucked in it. If all else fails, then check the floor to see if there are any suicidal jumping fishes out there. If the number of fish is still not accounted for, then report the case as another X-File.
Bookmarks