Make sure your gauge is "vented" at the liq fill point, liquid guages must be vented unless they are designed to be "pre" vented by the manufacturer. On valving open all 3 as you have done and you should have a more aggressive boil on the shallowest one or two, you may have to look very close to see it but it should be there. Then throttle that one or two back to even the boil out. Every 2-3 months flex (burp) the discs by having two valves wide open and closing one.Do this for a minute on each. Alternate thru the valve bank to flex all 3 stations. Most discs are advertised as "self cleaning" but none really are but this is as easy to clean as it gets. should take 2-3 minutes to clean all 3 stations.Startup in mid summer with the huge pump you have is a good question> Try this-- run 1 hour today and increase an hour each day to you get to 4 hours and then hold for 3-4 days at 4 hour then add 2 hour to 6 for a few days then 8 for a few then to 12.Are you trying to get to 12 hr total run time as I dont recall?If this is too fast of a startup and you get some "floaters" shut system down for a day and go back to the previous lesser runtime and restart.Just watch your fish as they will let you know if all is not well.Piping, slow movement,off feed etc. Your startup is a real unknown as the lift with that pump makes it a potential challange this time of year, Good Luck, gotta run back later today !!
