I thought about a closed loop system, but I have so many benefits vs the few negatives Just have to give it a try. Rainwater is a non issues based on my set up. The well casting will be about 12" over grade, so that will solve that issue. although if we get a big hurricane I will have to run a close loop temp.
Well inlet
Effluent discharge
I also am hoping to avoid freshwater top off's. I have been running this way for a while and my salinity in my Curing vats has stayed between 10.024 and 10.025 with no freshwater added.Also my alk(3.0) and cal(440) have been very stable, much more then my closed loop tank.
Another huge plus for me is Temp. I have a constant battle with water temp in my closed loop system. In the summer It runs around 85. With the well running all the time I should be able to maintain a constant temp around 79. To be honest alot of this is just me making my edjucated best guess, might be way wrong in the end.
Also I see a great benefit in avoiding a skimming. If I went to a closed system I would have to do aggressive skimming. I plan to have a bunch of Lookdowns and they create a lot of waste I have been told.
Finally I am hoping I can get quite a bit of control, speed and flow with programming my new pump. Its been fun messing with all the controls and its an amazing pump for the money.
I did have to change the seals and such to make it saltwater compatible. We will see if it lasts,lol