HEY! My tank is too clean! ....Huh?

its strange but my tank has me completely puzzled.

i've had it for about 8 weeks and for at least 7 weeks the cloudiness drove me crazy.

Then i had a huge water change, much more than i should have (at least 40% which i now know is not a good idea) I also gave the filter a good clean (in tank water) and done the gravel

Put new water in and within 2 hours i had a severe bacteria bloom (white cloudy water) i it really put me in a bad mood :mad:

That was 3 days ago.

Now my tank is fantastically clear and it looks brilliant and i havent got a clue why and apart from a problem i have with a molly the fish are looking great.

:)
 
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Large water changes are not a bad thing. Large water changes that significantly change the water parameters (ie, cause a huge chnage in pH, temp, etc) are a bad thing, because they can shock the fish. But, large changes using matching or close water parameters, are very good.
 
If its a bacterial bloom or algae bloom then a uv steriliser will cure it! It will kill any suspended bacteria but there will still be plenty on your filter media so dont worry about your biological filtration being destroyed - the uv will only kill the bacteria that actually enters the chamber and most of your bacteria will colonise surfaces and not be suspended in the water. I bought a cheapo garden pond uv sterilser with an 8w uv tube and it works fantastically and was a lot cheaper than the ones designed for aquaria! I realise that they are still not cheap though.

The other possibility as you have just mentioned is that your substrate is different between your tanks. It could be that the gravel itself is dissolving or at least is very dusty. To see if it is the gravel clouding your water then takesome of it out into a glass jar and fill it up with some tank water and put it in a dark place to stop algae growing. If it goes clear quickly then you know its not the gravel! Saves you changing the substrate in your tank only for you to have the same problem!
 
When i say cure it what i really mean of course is just that it will clear the water!
 
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