Bros, need some advice....
my overflow consist of 3 compartments
1st and 2nd contains filter wool and the 3rd is bio balls.
i intend to remove the bio balls cause NO3 is always hovering
between 10 -15 . need advice on what to replace the bio balls with??
or just leave the 3rd compartment empty....
hhmm... the small bubble so far so good leh, put it near the
top of my tank, got more light ...lol.....
aiya, i got no time to get the MH leh.....
OH xmas coming leh, u buy me MH for xmas gift lar