Herbie Questions

[FishyFishy!]

I have the same issue. Probably once a month or so. Same goes with my skimmer etc. Everything always seems consistent, but im still adjusting from time to time. I use the emergency trickle as well. I find that works the best, and adds a little bit of surface skimming to boot.

I think kien is onto it. Little changes in where the water flows I think is the cause. Could be small, unoticable things. Thats what im thinking anyways.

I also have a theory that because I drip my kalk into my return chamber, that the pumps change their GPH over time as they get gummed up. Ive been vinegar bathing my return pumps more often in my maintenance routine, and that has really helped. Havent touched my valves in a while now.