I have a tank thats bare bottom right now and I'm adding the sand soon. I know that the water gets cloudy when you add it, would that harm the fish? I don't know if I should take the fish out for a few hours or what.
Try washing a bit, then if it runs clear you know the rest should be clean. If its dirty wash it all.
Get a funnel and some thich hose. Then slowly poor the sand through the funnel down the hose and onto the bottom of the tank. This should keep the tank a lot cleared than just dumping it in
ooooold topic!sand is bad for pumps mk turn them off . i got sand in a pump once not good. a spunge on the intakes helps with sand a bit and helps with small fish and more bio area too.