couple of questions

[Abbyreefer]

Its been a while since I've started a tank but the other day I finally finished the stand for my 65 gal tank and filled it with RO/DI water WOO HOO !!! Anyways I then added the salt (instant ocean) put in 3 koralia power heads and a heater and let it all mix. Well 3 days later and the salt water is still cloudy, not super cloudy that you cant see anything but cloudy enough that its very noticable. I cant reemmber when I had my previous 95 gal tank if I had the same thing.. Is that normal ? How long does it take to go away ?
Also I found out my sump was leaking after I started to see the puddle on the floor. So after a few choice words and some frantic syphoning to get the sump empty and out I notice on one side it was a very slow small lead but after a few days is when I got the puddle. Anyways I've taken the sump out and used WELDON PVC clear around all of the seams just to be sure ( 2 coats so far ) but was wondering how is that going to be for the fish in the tank (much later on) will it leak any toxic chemicals or am I safe ?

Thanks in advance with any advice.