it would be hard to stop him eating food for other fish,in the wild they wouldnt eat everyday but are oppotunist so if they find food but arnt really hungry will probaly still eat it.it best if they can have 'no food' at times to allow there digestive systems to clear out as they wudnt be doing it in the wild non stop.my fish can go a long time without food and have no side effects.i feed 2-3 times a week, each individual will eat differant amounts and daily or weekly.so what im trying to say lol is if you can prevent him from having a pop belly everyday do it, as it will put a lot of strain longterm on his digestive system if he dont.my tank cost alot as i went for acrylic which is 35mm thick but other than that i run two fx5 filters and an ehim 3.lighting is t5 x4 bulbs at min could do with 6.heaters are titanium duels,very cheap and best ive ever used...so acurate.daily running costs are next to nothing.