All you feed is brine shrimp?? That is not what your pictus is fat on...unless there is something else wrong with him than overeating. Brine shrimp basically has no nutritional value whatsoever, so you may want to re-think your food...
mostly it is brine shrimps. twice a week - peas/other vegitable, sometimes - algae wafer, and I put cucamber overnight for pleco. leave food - about once in 10-14 days.
is it too much?
how often should I feed them and how change the diet to make it better?
It used to be in a different tank, with no other fish, so it was easy to control the amount of food it ate. now it is in 40 g. with others and I worry that other fish does not have enough food because of him and it started to eat more that it should. the pictus does not look fat..., it looks normal and healthy. just when it eats all the food it looks like a ball...which is not good
I am sorry I thought when you said that "it looks like a ball" you meant that the pictus looked fat??
I dont think pictus cats eat veggies, although I'm sure he will if he gets hungry enough. You should mix up their food a lot. Maybe feed brine shrimp once a week or once every other week. Get some frozen bloodworms and feed those once or twice a week. My pictus loves the normal flake food that I feed my fish also. Same with the shrimp pellets, although I have to go easy on those because he likes them a LOT.
Well I'm sure the pictus is very hungry if mostly all he gets is brine shrimp...they need some nutrition! A fish will starve to death only eating them. You should feed them as much as they'll eat in a few minutes, once a day. Put the veggies in at lights out for the pleco.
Once the pictus is a little less hungry he'll probably back down a little.
You can try putting food on two ends of the tank to try and make sure that all the fish get some of their respective foods.