+1000 kay bro thurmac...
IME ang size ng screen ko is 7x10 inches.. i lighted each side with 2pcs 20watts cfl.. so i have 80watts total sa ats then my pump is just 2000lph... and works for me.. bringing down my NO3 and PO4 to "0" according to API test kit...although i have mangroves
but i think the ats is doing the big part there lalo na pag green algae na ang kumakapit sa screen..