That's my impression too at this point ... I've spent a lot of elbow grease, vaccuuming the substrate, trying to get the tank cleaned up ... looks very clean now (and I got the nitrates down) but ... would you recommend I temporarily take the fish out and remove the under-gravel filter? I'm afraid I might really mess up the balance of the tank. BTW, I did see 12" or so tinfoil barbs at a LFS and they sure looked like they had red tailfins, contrary to lots of references I checked that said tinfoils get really big but the redtail tinfoils get up to 8".orbit;2519174;2519174 said:Personally, the undergravel filter thing is not the greatest. I believe they trap more bad rather than filter it.
I have the same tank set up in my bedroom. I also have the red tail shark, hes awesome, tinfoil barbs get monsterous! Trade him for a way smaller one and that should work for now!