Why there is a layer of dust (like oil) on top?

[chellie4u2]

thats exacty what i had to do except i didn't have to cut my sponges they stayed down when i pushed them down, and i had all the vents closed except the top.. I got the waterfall effect idea out of the instruction manual..
well im happy that worked for you!! :joy:

 

[curiousnano]

Originally Posted by Chellie4u2
I have a 24g NANO and where the water goes into the filter you need to get it to look like a waterfall, did yours come with little black plates that you can use to control the waterflo? so you need to have the water level lower in the filter area so the water in your tank looks like a waterfall.
Problem Solve - This is exactly what I did and it WORKS. Thanks for this tip.
I update my new tank pic.

 

[chellie4u2]

your tank looks AWESOME!!