Thanks Tom,

That is a relief.
One question though, I one time did a 90% big waterchange to get rid of GW, and my harlequins went directly belly up when i poured the water in, Temp was fine, so I really thought it was a PH issue, I had a small 10 gallon next to the 75 and could safe at least a bunch of them to catch them fast and trow them in the 10 gallon but it scared the s*** out of me.

But thanks for clearing this thing up

Evert