Could use a little input! - The Planted Tank Forum
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post #1 of 4 (permalink) Old 03-23-2013, 03:05 PM Thread Starter
Algae Grower
Join Date: Feb 2013
Location: Grand Rapids, mi
Posts: 28
Could use a little input!

I have started a med/high tech 10 gallon planted tank. It has been set up for about 3 weeks.
(2) 26 watt 6500k CFL lights *vertical*
AC20 filter
2.5lb co2 tank with dual stage regulator and ceramic diffuser
I have a big hand full of tall plants is one corner.
And a lot of rock scape in the middle.

The last few days I have been getting a lot of oily scum at the top of the tank. Which I am guessing it is from the die off of the plants as they have only been in for a few days. (tried adding a 240gph power head to move the surface but it was too much flow)

My co2 has been set up for 3 days now @ 1 bubble per 2.5 seconds & everything has seemed to go well until last night I noticed the bubbles are not popping anymore. they are just collecting at the surface above the diffuser.

What is going on? Is it normal? Bad?

I have a few ghost shrimp in the tank just to make sure it was safe for shrimp so far and 5 very small brichardi cichlids *which are being removed soon because all they do is hide in the plants*
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post #2 of 4 (permalink) Old 03-23-2013, 05:37 PM
Darkblade48's Avatar
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,670
Sounds like you have a biofilm that is developing on the surface of your water.

This is usually normal, and a little surface agitation will help eliminate it. If it gets too thick, it can hamper gas exchange.

There are various ways to get rid of the biofilm (i.e. manual removal); it seems to be caused be excessive feeding (i.e. proteinaceous in nature), though sometimes it may be bacterial in nature as well.


A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
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post #3 of 4 (permalink) Old 03-24-2013, 03:48 AM Thread Starter
Algae Grower
Join Date: Feb 2013
Location: Grand Rapids, mi
Posts: 28
I have removed it manually once but it seemed to come back within a few hours. I haven't fed my tank more than 5 times, even with the fish and shrimp in there.
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post #4 of 4 (permalink) Old 03-24-2013, 04:39 AM
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Join Date: Dec 2012
Location: India
Posts: 210
that's perfectly fine, happens..go ahead and buy a sunsun HOB-301, it's the smallest and cheapest surface skimmer. you'll forget about any protein layer build up..

Abhradip Choudhuri

Good judgement comes from experience, and experience comes from bad judgement.

Few of my works
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