| | Re: Cloudy 40 gallon start
It should clear up, but why wait?
1) Drain it
2) Aquascape (rocks, driftwood, hills and valleys)
4) Refill using the same careful method you used before. Allowing the water to run in slowly over a plate or plastic bag will minimize clouding, but not stop it altogether.
5) Begin the fishless cycle.
If you do not want to do 1 through 4, at least get started on the fishless cycle. When you are ready to aquascape the cycle will be that much further along, and you will be closer to being ready for fish.
I just filled a 'new to me' tank to test for leaks. I just dumped the substrate in through the water, a sure way to guarantee cloudy water, and sure enough I could not see through it yesterday. Today it is down to a light haze without filtration. Just one power head keeping some water movement going, and a big handful of duckweed. (no leaks by the way, but the tank is not level. Darn.)