Hi,
yesterday I added my new Male Dwarf Gourami to my planted 20g tall. He's currently the only fish in the tank, he looks like he's doing fine appearance wise, he's eating the flake food I provided no problem, but he seems to be surfing up and down the glass pretty often, along with constantly opening and closing his mouth. I got really worried when I noticed this and did a 40% water change. (before and after the test water parameters were ammonia 0, nitrites 0, and nitrates 10-15ish, but I did it anyways.) However I watched videos of other fish of the same species also opening and closing their mouth a lot, is this normal behavior for a Dwarf Gourami, and is the glass surfing just because he's stressed from moving tanks?
One more thing, he gets scared when I open the lid on the tank right now, so he doesn't come towards the surface for feeding yet. I don't have any other cleaner fish or shrimp in the tank yet to pick up what he doesn't see, so to prevent any raising in ammonia levels from uneaten food, I drop individual flakes in front of him to make sure none go uneaten. So my question is - How many flakes should I feed him, this morning and night I gave him 3 large flakes, is this plenty? If not let me know.
Sorry for this being a tiny bit lengthy, but I appreciate any advice.