biofilm - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 12-24-2014, 02:58 AM Thread Starter
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biofilm

Whats the cause? over feeding? too much nutrients(EI)? overstocked?
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post #2 of 11 (permalink) Old 12-24-2014, 03:16 AM
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Hi,

Biofilm can have a number of causes and is not necessarily bad.

If it is a new tank, under 6-months old or has had a major disturbance, it is likely bacteria and fungus trying to reestablish themselves.

It can be overfeeding, especially live or frozen foods. It can be crappy water or lack of water movement. It can be dead critters or vegetation that have not been removed.

It can be a great food source for fish such as mollies or snails.

What are the circumstances?

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post #3 of 11 (permalink) Old 12-24-2014, 01:13 PM Thread Starter
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Last week been dosing algaefix,maybe thats the causing the biofilm
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post #4 of 11 (permalink) Old 12-25-2014, 04:22 AM
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You can get a surface skimmer to correct this, I believe. Usually around $20 or so.
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post #5 of 11 (permalink) Old 12-25-2014, 04:28 AM
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Biofilm, stuck to surfaces is normal and good.

When the water has a surface scum, not so good. Increase the water movement at the surface, and this scum will get mixed with the water then removed by the filter.
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post #6 of 11 (permalink) Old 12-25-2014, 12:55 PM
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I read that surface scum is made up of organic molecules like amino acids and proteins. A 50% water change has made a big difference for me in the past.

IMO washing your hands (and arm if you're using it) before you put them in the tank might help.

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post #7 of 11 (permalink) Old 12-25-2014, 02:10 PM
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Surface skimmer is the faster solution. Guppys and sae sometime eat that surface protein, they make a difference. But that issue go away when the tank matures. Good luck
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post #8 of 11 (permalink) Old 12-25-2014, 03:33 PM
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bio film

I keep reading about increasing surface flow to correct the problem. Never worked for me. Get a twelve dollar surface skimmer and your problem will be solved.
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post #9 of 11 (permalink) Old 12-25-2014, 07:15 PM Thread Starter
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a bit confused, biofilm is different from surface scum? whats on top of my tank water is tiny tiny tiny particles of salt like stuff, is that surface scum?
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post #10 of 11 (permalink) Old 12-26-2014, 01:19 PM
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Quote:
Originally Posted by rick dale View Post
I keep reading about increasing surface flow to correct the problem. Never worked for me. Get a twelve dollar surface skimmer and your problem will be solved.
This worked for me. I had it for 6 month and then move my return to the surface it all went away.

You didn't say do you also have lot of driftwood? Some of the oily look could be from driftwood to if it still is leach out tannins.
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post #11 of 11 (permalink) Old 12-26-2014, 03:24 PM
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Biofilm is actually a specific growth on the solid surfaces in the tank. It is a structure created by the microorganisms, including the nitrifying bacteria. It has channels built into it that allow a good flow of water to all the organisms. The term I have read for this is "extracellular polymeric substance".

At first the bacteria stick to the walls of the tank, rocks, plant leaves, ceramic merpeople and each other because they are a bit sticky. Then they start to produce this matrix that modifies their habitat just a bit.

Surface scum could be just about anything that floats on the water, and includes oils and proteins, so it is usually a bit sticky. It reduces the amount of gas exchange between water and air.
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