I recently posted on here that I had a pump pipe pop off and soaked the electrics as there was a gap in the cover glass. I had 2 eheim circulation pumps with the idea being that if one failed the other was backup but what actually happens is that if one pump is off sometimes the water back feeds and siphons off back in to the sump, not a huge problem but doesn't make the water pass through the sump.
So, I have always hated the buzz from the Eheims and as the two were old I decided to try a single TMC 12000 lph reef pump and controller (reef pump 12000). These are controllable from 10watts up to 100 watts and run at 24v DC off a transformer.
At 75% it is silent and only at 100% can you hear a low hum, the flow is way more than the 2 eheims could muster and the electric draw less than half, I have swapped 200watts for 75 watts, gained massive flow and lost the noise.
The only down side so far is that my Derso pipe in to the sump has become noisy as it is gurgling with all the extra flow of water so need to play around with that a bit more.
If I now run the pump via a computer UPS (uninterrupted power supply) I could, if around to see it, knock the pump down to just 20w and the ups would run the sump and filter for quite a while in a power cut.
So, I have always hated the buzz from the Eheims and as the two were old I decided to try a single TMC 12000 lph reef pump and controller (reef pump 12000). These are controllable from 10watts up to 100 watts and run at 24v DC off a transformer.
At 75% it is silent and only at 100% can you hear a low hum, the flow is way more than the 2 eheims could muster and the electric draw less than half, I have swapped 200watts for 75 watts, gained massive flow and lost the noise.
The only down side so far is that my Derso pipe in to the sump has become noisy as it is gurgling with all the extra flow of water so need to play around with that a bit more.
If I now run the pump via a computer UPS (uninterrupted power supply) I could, if around to see it, knock the pump down to just 20w and the ups would run the sump and filter for quite a while in a power cut.
