guys thank you sa mga reply nyo the reason that i use this stuff is,it takes me almost 1 month to 1 1/2 month to have a water change because of my busy schedule and in that period i only put filtered water for water top off.
@dorado
thanks sa tip mo but im warning you regarding sa pagbili ng mga sale
item sa petshop,usually their product to be on SALE ay malapit ng ma expired or may damaged ( e.g packaging,storage ) so check first before buying.
OT: Mereef Christmas and a Hafish New Year