Sorry, but your English is a little unclear.PUMPERBRUNOX wrote:I bought a Rena 400 aquarium air electric, and I made the changes to pump. Before electric pumps had a MisterBed but by the noise of the returned. My problem is that with the pump for hours MisterBed could be bigger, but to feel discomfort and Rena air pump time is greatly reduced due to discomfort. If anyone knows of any remedy to reduce discomfort with some cream cn guarantees or technical improvement please let me know. I have read that magnesium sulfate heptahydrate help but I have too much information about your use form. Thanks
If I have understood you correctly, it sounds like your modified Rena400 is producing too much vacuum pressure, or just more than you are used to! Too high vacuum pressure can cause considerable discomfort or even injury. The simplest solution, if too high vacuum pressure is the problem, would be to introduce air bleed into the air line to reduce the pressure. You could do this by piercing a pinhole into the air line. Air bleed in through the pinhole should lessen the vacuum pressure. If the air bleed doesn't reduce the vacuum pressure sufficiently, keep increasing the size of the pinhole gradually until the pressure is reduced sufficiently.
If you are handy Electrically, a better solution would be to wire up a light dimmer to your Rena400 instead, to control the vacuum pressure.
Stay safe pal!