Agree with the above posts. 3 weeks doesnt sound cycled and this just sounds like far too much activity. 2x water changes per day plus everything else going on.
OK first, get a test kit. Forget clarifiers, filters, etc. Get that kit. Priority. Measure all your water parameters, daily. Check your tap water parameters too.
Second, use Prime in each WC. Constant big water changes to uncycled tank multiple times per day actually contributes and fuels the cloudiness. Just sounds like bloom because the water never gets to settle. If you Prime your WC and tank it will render the water toxics inert for 24 to 48 hours so you don't have to disturb the water multiple times per day. Like the post above said, WC only when levels become unacceptable.