Recent content by Bryan Deily

I do have flexibility with plumbing; I am not familiar with a spill weir. I assume I'd just pump water in and it would overflow out. I could make this work by adding a drain below my tank. The issue with this is when there is a power outage or the return pump is shut off the water level in the...

I got these two peristaltic pumps from China. Manufacturered by Honlite Industries. They manufacture pumps for a high end aquarium controller company Neptune Systems. These are their brushed motors rated at 800 ml/min. They run on 12v 3a. Here are the specs to each individual pump.

The tubing is identical; water temperature and density should be close as the salinity and temperature are matched. I feel like if these were my concerns I'd be working in the 1% error range. It is a great thought to have the waste pump at the surface of the return portion of the tank so it can...

I spoke with the manufacturer of the pumps and they have stepper motors available. If I were to switch to stepper motors and have them run the same amount of steps would that be easier? I'd just have to figure out how to control them as I intended on running the brushed motors on a timer 6...

I am trying to use the pumps for automated water changes in a saltwater fish tank. My tank is small relative to most which means the pumps would run a short time to exchange the desired amount of water. I'd like to see this scale to larger tanks as well which would require more precision. I will...

If I were to use variable speed drives and manually match speeds do you think it would need to be recalibrated down the road? Thanks for your input.

It seems most float switches couldn't handle 72w... so the plot thickens.

Thank you billy.

I was thinking of wiring a float switch into power down both pumps in case there is not enough new water in the resivour. This would prevent pumping water out without replacing it. If the numbers work out the pumps will be off by about 1/4 cup per day. My tank would never overflow due to...

I am trying to figure out the best way to hook up two 12v DC peristaltic pumps to run as close to the same speed as possible. The manufacturing tests had the pumps running within 10ml per minute which is acceptable; when I hook the pumps up in series they are not even close. When hooked up in...