Hi, One of the new fingerlings trying not to get eaten alive. Brief background, 1/2+ ac. pond 23' ctr. depth, 2/1 side slopes, spring fed. 350-400 trout+fatheads. Ok... last summer was dry my springs couldn't keep up with evaporation rate. To resolve I'm building system around a Gast 741R 1/4 h.p. compressor. Can anyone suggest hose (weighed vs. non-weighed) and diffusers? Also, check valve placement and pressure gage. Any suggestions appreciated. Thanks Slydog