how well do they really do?
ive been thinking about this lately and im wondering
how well do these actually do on a tank
do they keep nitrates hammered back in the low levels? (lets say under 20ppm)
and im talking monster fish or over stocked tanks or better yet.... both
ive been thinking about this lately and im wondering
how well do these actually do on a tank
do they keep nitrates hammered back in the low levels? (lets say under 20ppm)
and im talking monster fish or over stocked tanks or better yet.... both
