thanks danano for ur advise.
im using seachem reef complete n another seachem product to raise the kh level. before i do anythng i test the water for cal, ph n kh too. then i test again after dosing it. when i dose cal n kh, i do it on two different days
about the lighting, its 1 pl 50/50 and one pl actinic and one fl 20 000k. i dont see the point abt adding more pls as im gg to upgrade to t5s and possibly mh in the near furture.
what i suspect that is wrong is that i think its the lps warefare issue that is affecting my clams.
again, thanks for ur advise