I forgot to mention my setup with my last post. Tank specs are: 25H tank 24" X 12" X 21" pH 7.0 about 200ppm hardness Terralit substrate addative under 2-4" of 2-5mm gravel DIY CO2 injected into 2211 Ehiem canister filter 175w MH pendant lighting Thanks again! -- Jesse Mathies Surrey, British Columbia Canada mailto:jessem at direct_ca