PNWaquarist
Aquarium Advice Addict
I have fine black sand in a new tank, and had a tough time getting the "cloudy" material out via the standard washing method. What I ended up doing was washing 5-7 lbs at a time with 4 x 4 gallon aliquots of water, and adding it to the tank afterwards. After a couple of days, the water was still cloudy. I siphoned all of the water out of the tank, and added fresh water back in slowly with a siphon. I had a 5 gallon bucket up in a 4' ladder and siphoned the fresh water back into the tank, letting it run down the side of the glass, to minimally disturb the sand. Worked like a charm.
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