ya i did a 25% water change and have the crbon they gave me but didnt use it till i got my toadstool leather 3 days ago and then this happened this morning so i did the water change and added a sponge and still cloud...not as bad but i dont want my nano to crash
Looks like a water borne algae bloom to me. I would recommend not doing anymore water changes, turn out the lights for 2 days and change the carbon every other day. I had the same thing happen to me a couple years ago and this process cleared it up! It will not harm any thing in your reef but of course the sooner its gone the better.