Jb, i wouldnt worry about it.....
Sometimes i go off the deep end... my main point is bigger is not always better. Some of us would instinctively think buying a big pump and just restricting it would be wise...
Our application is intermittent use and with a pump that is relatively inexpensive... we dont need to get 1,000's of hours of operation
For the ones that will follow you with this thread, dont buy the biggest pump you can find and choke it down. In addition to cavitation concerns, that flow is also what cools and lubricates the pump.
It'll be great to see how it ends up working. Cp's definately enjoy water flow and keeping the water fresh
My Growlist: http://www.terraforums.com/forums/sh...29#post1089429
After a bunch of tests, I've noticed that every now and again when the pump turns on it doesn't seem to be able to push the water up the tube. Turning it off then on again clears up the problem. I figure it must be pressure left in the tube from the draining. Anyone have any thoughts as to what's going on or how to solve the problem?
Anyway... I've found some glass to cut a top from. Still working on plans for keeping the ambient humidity up. Hopefully Saturday I'll be able to get back into it and make some more progress.
Mine does that if I place it in the reservoir with the inlet to the bottom. I have to assume it's just a lack of starting torque. It's never done it in any other position.
Try laying the pump on one side or another and see if that helps. It may be just enough of a diference in loading to cure the problem. The problem may also fix itself as the rotor bushings loosen up a little with use.
Thanks again, Butch. Don't know what I'd do without you!
---------- Post added at 07:19 PM ---------- Previous post was at 06:39 PM ----------
The good news is that the humidity seems to be staying around 85% without any interference from me. Really close to where I want to be with little effort.
Well, I got the top cut and fitted today. Never thought I'd be so happy to have worked at a glass shop. Anyway, I'm trying to figure out whether to make an opening on one side for air exchange or put several holes along the top (again, any feedback on this is most appreciated). Right now it's holding humidity at 99% even after the water drains out. Monday I'll be adding the fan(s) and substrate to get the final stage of testing out of the way. I'm thinking at this point that the LFS base I was thinking of using won't be necessary. I think a couple inches of clay pellets should do the trick. Hopefully I'll have it all up and running and be able to put plants in it this week!
The pump is running perfectly. Av, you were totally on with tipping it on it's side.
Bump... hoping for some thoughts on ventilation... =)
I would think one on the side, sorta low... and one on the top at the far end... that way you get cross ventialtion via convection or small fan