sbazain
New member
will it hurt the beneficial bacteria if I replace the sump, need to make it larger for new skimmer but don't want to harm the fish or my invrts had a bad experiense changed from hob filter to sump and crash time everybody died what would be the best way to make this change this sump is been running now for one year is pretty stable really don't want to remove but don't have the space it keeps my nitrates and ammo at 0, what to do
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