actually u can find aglae in the natural sea too~~
even ur phosphate read 0~~ once a while algae will still appear
dun want to have algae~ maybe dun even keep a single fish at all
Less Fish Poo- Less nutrients- less algae
I kept two fishes-- but till date i never feed them for months*
feed on pods etcs
luckily they still survive
*even the best fish food will still release some P04 out*