Tank cloudy

It is most likely a bacteria bloom.

Is it kinda white-ish cloudyness? That happened to a couple of my tanks when started up. If its the same as mine, it should clear up on its own in a couple days.

I used a cycle product when setting up my first tank (4 weeks ago) I had cloud aswell - cleared in 2 days kept to daily dosing of cycle product.
Now have 6 x Zebra Danio in there and they seem just fine
I agreee (form advice I've had form friends as I'm new too!) that it's most likely to be a bacterial bloom. I did a 3 week "fishless cycle" as didn't like the ethics of chucking fish in and watching them suffer bnut I am told nothing matures a tank better than some fish but be careful not to overstock or the bacteria in yr filter won't be able to multiply fast enough to cope with increase in polutants.

The cloudiness just means that your tank is cycling and it is called a bacterial bloom which means that your bacteria is trying to multiply to break down the waste in your tank, so it is not nesessary to treat the water.

Generally, the bacteria responsible for oxidizing ammonia and nitrite are NOT free-floating, and they multiply pretty slowly. The cloudiness described is therefore almost certainly not a bloom of the nitrifying bacteria, but of the other mormal microorganisms that inhabit our tanks. The populations of these organisms can become unbalanced for a number of reasons, and as a result, you can see these 'blooms' even in healthy, cycled tanks.

For the most part, you're better off ignoring the white water and keeping your eye on test results for ammonia and nitrite. They'll give you a better idea of what's going on in your tank in terms of the cycle. The white water will go away on its own. Trying to force it away by adding water clarifiers or other additive usually only compounds the problem.

HTH,
Jim