CL on 34gal Cube

[Chad]

Ok, just a quick question to some of the plumbing guru's.

What are the thoughts on using a Poseidon T3 / T4 as a pump on a CL system. I will have a single 250w MH over the tank as well.

I have read a few issues about the PS pumps introducing a lot of heat to the tank. Wondering if the heat will be too much for this small of a water volume.

Anyone have a suggestion of a different pump if not this one? I do need it quiet, and I really want to eliminate power heads. Which is why I am going for this CL idea.

Any help is appreciated!! Thanks

Best Regards
Chad

[mr_alberta]

Don't use this pump on a 34G. I use it on my 15G nano and if I didn't have a chiller, the water temp would go into the mid-high 90's.

You may consider something like a PanWorld 100. I have one of those as well and it seems quiet (though I haven't really used it, just a quick run to make sure it worked).

[Chad]

I am trying to not buy more equipment, I already have the velocity pump.

Anyone else have experience with these pumps. What sort of temp increase do they add normally?

Would a fan over the sump be enough to keep the temp down? I just cannot imagine these pumps adding that much heat :-)

[mark]

Originally Posted by mr_alberta

Don't use this pump on a 34G. I use it on my 15G nano and if I didn't have a chiller, the water temp would go into the mid-high 90's.

Wow, that much rise from an external pump.

on a tank that small with MH lighting and a t3/4 pump, I would think your water temp would hover in the mid to high 90's. those pumps are horrible for heat transfer!!! A mag 7,9,or 12 would be a much better bet, and reasonable in price... There are other inline pumps I would recommend but they are very spendy and you seem concerned about cost. that t3/4 pump with a fan for cooling would still cook all your livestock, unless you had a wind tunnel of fans over the tank and topped up about 3+ gallons of evaporation a day while having the sound of a jet engine in your living room....
my personal opinion, those pumps are not worth their weight in feces....

[Chad]

Well, I didn't want to spend money if I didn't have too. I did not know the velocity put out so much heat.

What would you recommend then for a external pump that is reasonably quiet? I do not want a submersible pump.

any pump I would highly recommend would cost $3-400 for a low flow pump, Are you aware that mag drive pumps can be used inline as well? and have been by many with great success! they are also disposably cheap!

[Interior_Reef]

A snapper would do fine, very quiet, and works great, even when you have to restrict the flow. These pumps actually use less energy if you throttle them back.

I've had one for 2 years and its been great.

Originally Posted by Interior_Reef

A snapper would do fine, very quiet, and works great, even when you have to restrict the flow. These pumps actually use less energy if you throttle them back.

I've had one for 2 years and its been great.

Im suprised by this statement, Im no expert on pumps, but I was under the impression that any pump would be under full load, or even excessive load when restricting the output of said pump??? Not being able to efficiently scavange the water would create turbulence at the impeller, forcing the motor to work harder to spin the impeller(motors are wound and loaded to spin at a certain RPM,I believe this is one reason why mag drive pumps dont heat up as much as wound motor pumps do when restricted). At least this was my understanding of basic fluid dynamics and impeller load... Please set me straight if Im under the wrong impression, curiosity strikes!

[Interior_Reef]

http://www.reeflopumps.com/images/flow_charts.xls

straight from the manufactures site.