Quote:
Originally Posted by lastlight
My RC sludge is red/brown and pretty nasty.
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I was using IO without a problem (a bit of ca buildup over time), then I switched to H2Ocean and got the nasty red-brown film in my container and it spread to my sand bed, I then switched to Reefcrystals and now I'm back to the same as the regular IO.
I have a 20 gal mixing container, I add 4 cups of salt at a time and let it mix at least 1 hour before adding more. If you add the salt too fast the stuff will precipitate out.