"JEB" wrote in message
...
I picked up a used overflow box on ebay that has some pink and green
deposits in it. Must have been in a marine tank. Anyone know a safe,
effective way to clean acrylic?
thanks-

James

I used a vinigar solution, as I had the same thing. I bought a 75gallon with
20 gallon sump, and everything had gak from the reef that used to inhabit
it. A soak in the vinigar solution loosened up the worst, I scraped off some
more while it was wet, and the rest that wasn't visible to the casual
observer I just left.