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Oily film on water??
Over the last couple days I've noticed an oily film on top of the water. I'm assuming it's caused by the food we're feeding. All the dry foods we use (pellets, flakes, etc) is made by Tetra. Anybody else have this problem with Tetra? Can you recommend a different brand that won't cause this film??
125 gallon tank:
2 Tiger oscars, 1 Electric blue jack dempsey, 1 Jack dempsey, 2 Bala sharks, 1 Firemouth, 1 Salvini, 1 Texas cichlid, 1 Pleco; All juveniles
29 gallon (in the works):
1 Blue ram, 1 Cockatoo cichlid, 1 Powder blue dwarf gourami, 1 Bolivian Ram, 8 Neon tetras, 4 Corydoras, 2 Bamboo shrimp, some ghost shrimp
Originally Posted by stevef10 View Post
Some fish don't like an agitated surface, especially surface fish like hatchets; I know the books say they will stand motionless in the filter current, but in my tanks I find that when they have the opportunity they stay out of the current and sit quietly in the calmer areas.
In a planted tank, the last thing you want is strong surface agitation because it drives off the CO2 that the plants need.
I have Eheim canister filters and they make a surface skimmer device that attaches as a separate filter intake and there is a very slight "pull" of the surface water that keeps the film from forming but is not sufficient to agitate the water. The only drawback is floating plants that can block the skimmer, or snails that crawl in and when they grow a bit block it.
Byron Hosking, BMus, MA
Vancouver, BC, Canada
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]
Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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