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There were a lot of good suggestions in the previous post. But, whenever I set up a new tank, I put the water in after adding the gravel, decorations and any plants be they plastic or real,, then I let the tank run with no fish in for a week to let the water "settle down." That way, if there are going to be any cloudy issues, ect there are no fish in the tank to suffer plus it lets the chlorine filter/evaporate out. I know there are chlorine removers on the market that are very effective, but just letting the tank filter and sit with no fish in it is something I was told todo many years ago when I first started keeping fish.
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