11 discus in a 90G is stretching your fishload, especially if they're not juveniles. Discus are messy and the bigger they are the messier. By going from 3 to 11 of them in one go, you may have suddenly increased the amount of NH4 going into the water and overloading your biofilter so it's not being processed into NO2 and then NO3 quickly enough. Algae apparently love NH4... Laith -----Original Message----- From: Nickeydundee@aol.com [mailto:Nickeydundee@aol.com] Sent: 31 January 2005 03:02 To: aga-member@thekrib.com Subject: [AGA-Member] correct balance of fish Hello All, Thank you the help with the algae eaters.. I have eleven discus in a 90 gallon and before the addition of them I wasn't having any problem with algae. I had only three discus in the tank and things were going smooth plants growing etc. So, I am left by reasoning and by the removal of the oto's that maybe I put to many fish in the tank and have upset the balance and made it more suitable for the algae then plants. Has anyone ran into this problem? _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member