You did not mention how long you keep the lights on. typical is 10-12 hours, but depending on the strength of the light, you may have to shorten it if the aglae keeps appearing. (co2 not enough, algae appear).
the cloudy water is probably "green" water. if this persist, do a black out (cover up the entire tank with black trash bag for 3 days. remember to stop the co2). But you said it is only cloudy upon changing water...so it might be the sediments that you are stirring up.
if you can read this, you are too close.
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