I have a whole bunch of tropical fishes in my tanks

and I feed them ALL tropical fish flakes, and my otos come up to eat the flakes as well, and they have nice beautiful rounded bellies. So they also do a good job on cleaning the algae off my tank

All I have to do is just feed the fishes and the otos come up and eat the flakes.
And then weekly water changes + siphoning the gravel and then
RO water or Amazon River water does the trick. Usually I use the Amazon River water instead of RO. The water filling station is a little bit far.