Tropical Fish Keeping banner

1 - 7 of 7 Posts

·
Registered
Joined
·
480 Posts
Discussion Starter #1
My 90 gal new tank as a thin film on the top of the water. any idea what it is?
Is it safe?
should I try and get rid of it?
How do I get rid of it if I should?

Roger

90gal fish tank
sump with large sock filter.
UV light.
two 150W metal halides
two 90W power compacts
water nitrates 40ppm
amonia 0
nitrites 0
temp 81
 

·
Banned
Joined
·
1,591 Posts
Do you have any powerheads.
 

·
Banned
Joined
·
1,591 Posts
Its probaly not enough to move the surface of the water. The film is the particles in the water floating to the top. You need to have a PH break th surface of the water so the film wont accure.
 

·
Banned
Joined
·
1,591 Posts
In mine I have 4 powerheads 2 at the top to break up the surface and 2 on the bottom to give movement in the bottom
 

·
Registered
Joined
·
1,645 Posts
Definitely need much more surface agitation. The film, bio organic materials other wise known as algae food, is preventing proper gas exchange. This could cause all kinds of problems from low oxygen which is bad for living creatures to high CO2 which creates carbonic acid and will cause your PH to fall out quickly. You mention having 2 powerheads in a 75g. What size are they? I only have 2 as well in my 75g except they are each rated at 1,600 gph, Tunze turbelle stream makers. Proper flow is extremely important.
 
1 - 7 of 7 Posts
Top