'oily' surface

[jerome9731]

need help
my tank surface is always cover by a firm of oil like when i look from under the water upward.the oil cant be scoop using a net.everytime i did a wc to get rid of it 1 day later it would appear back again.
realy no idea what happening.

my almost 2 month crs tank has only taiwan moss,riccia and downoi.a diy co2
and cannister filter

maybe your food is oily ?

Originally Posted by jerome9731

need help
my tank surface is always cover by a firm of oil like when i look from under the water upward.the oil cant be scoop using a net.everytime i did a wc to get rid of it 1 day later it would appear back again.
realy no idea what happening.

my almost 2 month crs tank has only taiwan moss,riccia and downoi.a diy co2
and cannister filter

I also have the same problem! And my tank I don't throw in any food at all since its a planted tank with only 1 pleco, 2 shrimps, 3 pencilfishes. Cannot be due to food I throw in since there is no food!

[warcraft168]

You can put a few layer of newpaper on the top for an hour or so, then the oil will be absorb by the paper or get a surface skimmer.

Its normal bro, we all experience that. only way out is to scoop it out or install a surface skimmer.

Add a rain-bar to spray on water surface, problem will clear...

rain-bar? whats that?

You can buy it at LFS, plastic pipe with small holes. Connect it at the water out flow spraying onto water surface...

Originally Posted by bryant_16

rain-bar? whats that?

[Natureman]

Mollies will take care oily surface as they eat the oil from plants but then don't know they will eat CRS shrimplets or not. My cherries are ok with a few mollies.

My advice is that no fish should be mixed with shrimplets unless its an oto or chinese algae eaters.

I guess not many people will have the balls to keep mollies in their crs breeding tanks just because of the oil layer. haha. especially in high grade tanks.