I suppose any standard adjustable pressure relief will work. I only an familiar with the one sold by GAST Mfg with 3/8" threads. From the factory it is set for full relief at 15psi. Maximum setting would be around 25psi. If depth of operation is greater than 30ft then another type pressure relief would be better.
A pond from clear to weedy can be due to several things but it is likely that too little aeration caused the excess 'weedy' condition. Type of weeds is the main factor to consider. Are weeds filamentous algae of rooted vegetation with leaves stems and roots?
Excess weed growth very often results in clear water as you are noting.
Last edited by Bill Cody; 04/21/14 08:30 PM.
