Broomer... RE: closed loop head pressure

[melbournefl]

Hey guy, happy holidays. I did more research and found out I was right, there is effectively no head (vertical lift) when using a pump in the closed loop environment, no matter how far below the tank the pump is. The "siphon pressure" offsets the "lift pressure" net = zero cool huh? Now I can put the last two closed loop pumps under the tank with no worries.
Later,
Paul

 

[broomer5]

Cool Paul !
You're on your way then !!
Good luck and we want to see pics when it's done ~ okay
BTW - You've given me an idea now on a totally "pumpless" closed loop water circulation system.
It may be impossible to do - but then again it's cheap to try.
Time to fiddle around with some pvc again

 

[tangtang]

I'd love to hear about it Broomer! I'm trying to figure out the best pumpless pump to use to add on a refugium to my cycling 100 gallon. I'd like all the future pods(?) to make it into the tank. I WANT A MANDARIN!!! <smile> Maybe two!!!
Linda

 

[broomer5]

It may be "physically" impossible to do.
But I have some ideas I'll be messing around with over the next week or two.
If anything works - I'll let you know TangTang

 

[melbournefl]

too cool broomer, you may be on the way to creating the first perpetual motion machine YOU'LL MAKE MILLIONS but ... if you're thinking what I think you're thinking I'm afraid it won't work. No matter what level you move the I/O points, the best you can hope for is balanced pressure. Oh I guess if you had a high enough tank you might achieve 'trickle' flow but I can't see how you'd ever get more. The equalizing effect that we get from a closed loop only lower's the return head pressure to zero, it can never (that I can see anyway) result in a negative head pressure. Of course 25 years ago I also believed captive breeding of marine fish was virtually impossible so I'd love to be proved wrong yet again. Lord knows it happens 4 or 5 times a day around the house
Later,
Paul