Shango et al, They are rated by GPH. I don't still have the box, so I can't tell you the size. I used the smallest because it was for a 20 gallon tank. The pumps are rated for tank size, so if you are using one, the choices are simple although a "high tank" may confuse issues. If you just want to move water in a specific portion of 35 gallon tank I would stick with the smallest one. I am hoping to setup a much larger tank for natives. I will be discussing it's setup with experts at the NANFA convention at the end of September: http://www.nanfa.org/convention/2008.shtml I suspect I will be using different pumps (possibly 3) at different levels to match natural conditions in nature. Tom -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Shango Los Sent: Saturday, August 16, 2008 7:10 PM To: Greater Seattle Aquarium Society member chat Subject: Re: [GSAS-Member] Move the Water Thanks Laurel and Tom. I really like this Hydor Koralia pump. Tom, what size would you suggest for a 35 Tall Tank? Thanks Shango On 8/16/08 6:39 PM, "Tom Watson" <onefish2fish@comcast.net> wrote: > In my deep sand bed tank I use a Hydor Koralia movement and circulation > pump. It's really an underwater fan: > > http://home.comcast.net/~onefish2fish/fishweb/ > > Stream fish love it. You can place it and aim it anywhere you like. It > comes in three different strengths to match different sizes of tanks, or you > can mix and match. > > Tom > > -----Original Message----- > From: gsas-member-bounces@thekrib.com > [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Shango Los > Sent: Saturday, August 16, 2008 3:40 PM > To: Greater Seattle Aquarium Society member chat > Subject: [GSAS-Member] Move the Water > > Hi All, > > My 35 Tall Tanks keeps showing signs of low movement water/stagnancy near > the bottom. Right now the return of the water is by spraybar at the surface > of the tank. I suspect that the spray bar movement at the top is leaving > the lower regions of the tank kinda stale. What does one do to change that? > I bet there is some sort of piece of gear to buy or something. Please > advise. > > Thanks > Shango > > _______________________________________________ > 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 > -- Shango Los Fourthfold Visions, LLC www.ShangoLos.com www.OutdoorLovemap.com _______________________________________________ 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