How much flow the fish can handle is very dependent on the type of fish you have. I'm looking at have 10 times tank capacity flow through my mbuna cichlid tank, for instance (300g tank with over 3,000gph pump throughput), but mbuna tanks are frequently overstocked and they oftentimes don't benefit from being planted since the mbuna tend to munch on most plant stock. :) -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Jeff Sent: Monday, December 07, 2009 4:25 PM To: 'Greater Seattle Aquarium Society member chat' Subject: Re: [GSAS-Member] UGF and substrate Thanks Kypros, now that's cool; the part about using the filter as a co2 diffuser, I wouldn't have thought of that; my dr foster and smith automatic co2 system came with a reactor and its own pump and etc; I need to be careful though with sizing my recirc pump though since I will already have two Marineland c360 canisters flowing at a total of 360 gph each plus my wet/dry pump running at about 200 gph; that's 920 gallons per hour which is almost 4 complete cycles of the tank per hour; Does anyone have an opinion on what too much circulation would be for a 260 gallon tank? I want my fish to be healthy and strong in addition to great plants but I don't want to overstress the fish with too much current! Thanks for all your help, Jeff. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member