Water changes

[marie]

Originally Posted by tang daddy

I never have to drain the main display for waterchanges only the sump, therefore the corals remain in water but I find large water changes good for certain corals ie softies but not too well for sps anyone agree?

I've never had a problem in the past with large water changes and sps. Of course the last 18 months all my sps are in my 175g and I don't have a mixing bucket big enough to do a large water change, I wish I did