So after reading your comment about protein I decided to look at the ingredients on my algae tabs.
Dried skimmed milk, fish meal, potato protein, dried yeast, wheat gluten, ground brown rice, shrimp meal, algae meal,...
3 or 4 out of the first 8 ingredients are largely protein.
Also:
Guaranteed analysis:
min. crude protein 43%
...
That seems like quite a lot of protein to me, but I don't have another fish food to compare it to. Is it enough?
The tablet that I put in a few hours ago has completely disappeared; not even any residue in the gravel. I'm pretty sure the filter sucked most if not all of it up. The water in the tank circulates very well, in fact, it keeps tossing my moss ball around until it lodges into a corner, usually next to the heater(Grr).