chipmunkofdoom2
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You mention the resin has been regenerated a few times? Is it a single bed or mixed bed?
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Thanks for the input. I do have the flush before the DI and it starts at about 150TDS and gets down to about 30 before i switch it to the DI and after about 20 gallons it only gets down to about 25 TDS before the DI. Good point on the carbon block. Maybe i will convert one to a 1um and continue to use the first sediment filter as a 5um. Then i may change the second carbon block to the silicabuster before going into the dual DI.
The flush valve on the waste line is still confusing me though. Does this just replace the flow restrictor and serve both purposes?
It was not regenerated by me but i believe this is how it was done. The packing was not tight and i actually opened it back up and added some more new resin to the top which is where you can see that it changed color on the first canister so im guessing the rest of that canister is now bad and just needs to be replaced.How did you regenerate the resin? Did you separate it and use sodium hydroxide and hydrochloric acid? If the regeneration process was not complete, it could be the second DI canister has to make up for the weak resin in the first canister. It could also be that the resin is not packed tightly enough and some channeling is occurring.
The other advice in this thread is good as well. You should verify the CO2 content of the incoming water. I suspect this has a lot to do with the quick depletion you're seeing, regardless of the regeneration process used on the first canister. Your membrane(s) could also likely use replacing, although it's going to be difficult to tell which is the problem because of the dual membrane configuration.
If you are getting 25 to 30 TDS after the ro membrane, and you know it is 5 years old, then IMO the first thing you need to do is get new membranes.Ok my ph is around 7.9 and the alkalinity is 300ppm from the Hanna HI755. I was gone for 9 hours to work today and you can see the di resin has been consumed twice as much as it was this morning and looks like it only made less than 1/3 of the barrel so about ~18 gallons of water. Please let me know if it is CO2 i am dealing with or just bad membranes as I want to get some water ASAP as i want to start the cycle on my tank. Still have OTDS coming out but the in is now reading 15 as i look at it but it was reading 30 when i got home.
You would have to call them.Ya im going to order the 99% 90gpd membrane. Silicabuster and Maxcap combo with a new restrictor and install a new 5um and 1um sediment filter and new flow restrictor. Does Marine Depot price match because it is cheaper on spectrapures website but marinedepot has faster shipping?
I can do this tonight. Also ive read that people measure the ph then bubble it for awhile and measure the ph to see how much it changed to determine how much CO2 is in the water. Is this what I should do as well? How long to bubble it for?
Ok my ph is around 7.9 and the alkalinity is 300ppm from the Hanna HI755.
Ok i have just redid them after the RO membrane and ph is about 7.2 and alk is 21ppm. Is this good?Yes, the percentage that is CO2 may go way up.