Heat Issues with Power Heads on Nano Tanks - HELP NEEDED

[o2zen]

I have a BC29 with the stock pump for the return and a MJ1200 for flow and I am getting a normal temp of 85 degrees. I do not want to add a chiller to this unit so with that in mind. What pumps are being used in NANO's that give off less heat?

I was running the MJ1200 only in the tank as the return pump with a Hydor for flow control on the return. I am now trying to get more flow inside the display so I installed the stock return and moved the MJ to the front. Any ideas?

 

[KMP]

I have an AP24. Got rid of the stock pump (32w) and have 3 MJ900's (7.5w ea). One returns in the stock location, one is attached to the look you see in the picture, and one (added since this picture) comes spills just over the back with some Rio t-splitter and flare nozzles. The two (loop, and coming over the back) are hooked to a natural wave power strip for alternating current. Tripled my flow and still less watts than stock. All pumps are in the rear chamber.

 

[o2zen]

Nicely done. Do watts transfer to heat the same no matter which pump or are there better pumps when it comes to heat vs watts?

 

[KMP]

higher the watts, the more heat. that's why i opted for mj900s (7.5w) vs. mj1200s (20w). i was able to use two mj900s for a total of 460gph at 15w w/the 900s vs. 290gph at 20w w/the 1200.

 

[charm]

While I'm planning my tank, I'm actually counting on the hear from my pumps. I'm taking a close acounting of watts, 17 so far, adding a little bit for friction from water flow, and then I'll test to make certain the water heats up to close to where I want it before even adding salt water. I'm aiming for lower watts, kinda like KMP has done, so that if I need to add a heater, I can. I just assume not run a chiller, too expensive. If I find I'm running too warm in the summer, I'll add an AC unit in the bedroom and thus I'll be able to cool myself off along with the tank.