CL on 34gal Cube

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!

the smaller magdrive pumps used inline mounted on a piece of neoprane or other vibration reducing material will be as close to silent as your gona get, short of building a sound dampening box filled with sound insulation to encase the pump body

[mark]

Could look into the Reeflo Snapper, quiet and would think by design low heat transfer.

Michika was putting one one her 28g

[banditpowdercoat]

FYI, tried a MAG 18 in my 45g. Heated to 88F in 3 days from cold tap water. Way to much heat. I am now running a Pentair Quiet one 3000 for closed loop(pump is in Overflow) and a Mag3.5 in the Sump. just fine.

[mseepman]

I use a Quietone 3000 for my return pump from my sump and it's been really quiet. I have no complaints so far.

Originally Posted by banditpowdercoat

FYI, tried a MAG 18 in my 45g. Heated to 88F in 3 days from cold tap water. Way to much heat. I am now running a Pentair Quiet one 3000 for closed loop(pump is in Overflow) and a Mag3.5 in the Sump. just fine.

a mag 18 is alot larger bodied pump than the 7,9,or 12 that I recommended, and transfers alot more heat, and is very noisy compared to the smaller mag drive series.

[Zylumn]

I am a proud supporter of the Velocity Pump. It does unfortunately generate heat but it is extremely reliable, has great flow adjustment, and far quieter than the person with this opinion.
"my personal opinion, those pumps are not worth their weight in feces...."

Kevin