I have a 75 planted tank at school that i run a Fluval 403 on. It does a great job and is very low maintainence.The hob filters do create some surface agitation which isn't good for the CO2 concentration. dave> _________________________________________________________________ Send e-mail anywhere. No map, no compass. http://windowslive.com/oneline/hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_anywhere_122008 _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member