Hi there, I would like to ask you if it's ok for me to change about 15liters of water in my OSCAR tank every couple of days I'm doing it at the moment and it doesn't seem to be affecting the RED TIGER I have in it at the moment I am also feeding it one decent size meal every second day with TETRA DOROMIN PELLETS in the morning then PRAWNS/BLOOD WORMS the next day I feed him ie MONDAY(FEED) WEDNESDAY(FEED) ETC.I've got a TETRA TEC 60 EXTERNAL FILTER running along side a FLUVAL 4 PLUS in a 48x18x18 tank.I also have a COMMON PLECO doing the other bits a pieces for too.
