10$ clip on fan vs Temps proof

Ocelaris · May 11, 2017

My Temps have been rising higher than I'd like, and just for giggles bought a cheap 10 fan and have it blowing on my sump 24x7. The results speak for themselves. Just wanted to share that quick proof of the effectiveness of fans. This is a very constrained environment, so results could be even better.

vanpire · May 11, 2017

I used fans with halides and they work great. I use my Apex to turn my fans on when the temperature reaches a certain point and stop when it drops to an acceptable temperature.

Ocelaris · May 11, 2017

Yeah, I have it on all the time currently, as you can see I'm still higher than I would prefer, and it takes days to bring the Temps down. Once I get to a food point I'll probably control it with the apex.

ramabama · May 11, 2017

Evaporation will increase a pretty good bit, be prepared so that doesnt catch you off guard.

jason2459 · May 11, 2017

I've got 3 fans going for my system and plan on adding another. One for the display and 2 for the sump. I want to add another for the display. Evaporation definitely increases when they start kicking on more. All cheap clip on fans. They use about 17 watts.

Swoody · May 11, 2017

My reef keeper lite turns a fan over my sump on & then off as required.... usually only happens during summer, but it does work.

AdamNC · May 11, 2017

Instead of it running 24/7, set it up on your Apex under Chiller. I've done that to mine. When the temps reach 79 f. it turns on and when it reaches 78 f. it turns off.

Ocelaris · May 12, 2017

You'll see in the pictures that it needs to run 24x7 as there is some inertia and to get it down within the range I want has taken days. The little fan doesn't have enough oomph to keep the Temps down when everything is running, so it needs a head start. However when it's within the 76 degrees low point, I may turn it on at 78 as a chiller. Thanks for the tip

Susan Edwards · May 12, 2017

I have a rms c250. It has 2 fans that came with it. I bought 2 more that hang on for like 22 bucks ea. One hangs on back blowing into sump (built into the back of tank) and the other I hang on the front (open the lid part way). I also put a regular small box fan on top of the hinged lid section to blow down into water. Works pretty good at keeping water in the 77 area. I also have a ceiling fan and a big fan on the floor I point up. I don't have a chiller yet and if this works, might put it off until next year. Got the fans either at marine depot or brs. marine I think. I also stretch netting across opening to keep fish from hopping out

BluewaterLa · May 13, 2017

You would get better results having the fan blow across the surface of the display tank or between the display tank and light source as this is where the heat is generated and exhausted better.
This has been the case for me with systems using a conopy and even open top displays.
Only on a large system in the past with lots if halides burning did I need fans over the display and the sump to help cool the temp

Susan Edwards · May 14, 2017

The red sea tank also has fans that blow inside the hood where the lights are. My office is nice and warm from the exhaust heat... I have 3 fans (the two that are part of the tank and one other) that blow across surface of sump, and 2 that blow across tank water. I also set the ac in the house down to 76 on hot days and that keeps me at 78 or just below. When we hit triple digits I'll have to set the ac down to 75 I'm sure and once I hook my display refugium to the main tank I'll have to add a fan to that