Is this normal for water surface?

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Fire Eel
MFK Member
Oct 11, 2008
1,895
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Malaysia
I noticed my tank water has a thin layer of what seemed like tiny particles of dust on the surface of the tank..
Not sure what caused it but the only thing I've changed recently is the superworms which I feed my fish.. The SW were fed with oatmeals..
However, all my fish are fine, swimming normal and all..
& I never overfeed my fish.. just a maximum of 5~6 SW a day for three fish in my tank.. not to mention I've good circulation in the tank as well & a turnover rate of 12~15x.. Water parameters are good too..
Does it look normal with the fine particles floating on the surface?

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Do you have a sump or canisters/hobs?

My mbuna setup did this when I set it up and when I doa water change. All canisters, so I added a Toms surface skimmer to one of the canister intakes and it goes away in about an hour.

none of my sumps setups do this because the water is skimmed from the top
 
I had the same crap in my mbuna tank and it looks like biofilm to me. Just lay a paper towel over the surface of the water to soak up the debris and repeat as necessary. I actually just learned this method about an hour ago and it works beautifully. A surface skimmer would do the job even better.
 
Jc1119 said:
Do you have a sump or canisters/hobs?

My mbuna setup did this when I set it up and when I doa water change. All canisters, so I added a Toms surface skimmer to one of the canister intakes and it goes away in about an hour.

none of my sumps setups do this because the water is skimmed from the top
Click to expand...
Nope, I've two overhead filters and a submersible filter.. Never really know about the existance of surface skimmer till you mentioned it.. Thanks for the info..

COG Commando said:
I had the same crap in my mbuna tank and it looks like biofilm to me. Just lay a paper towel over the surface of the water to soak up the debris and repeat as necessary. I actually just learned this method about an hour ago and it works beautifully. A surface skimmer would do the job even better.
Click to expand...
Paper towel.. Thanks for the idea.. I might try it..

Will this biofilm thing cause any harm to the fish in the long run? I'm not really bothered by it but if it affects my fish health, then I have no choice but to remove it..
 
It's completely harmless as far as I've heard.
 
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