Could be Caco. One of my light cases developed a crack and it was fixed 8 months ago. So it may have returned. However, last time that happened my salt was nearly zero as a result. So feels slightly different but still could be right. I cant do a bucket test because it has been raining like crazy in sydney. Significant albeit intermittent down pours.
I last measured salt on 2/2/17 and it was 5000
I last did CYA 26/2 and I took a punt at the reading as it was below 30 so I guessed 15. I put in 690mg CYA which is worth around 20ppm on 26/2/17. Reading today was still below 30. I cant remember ever having a good reading of CYA.
I have an auto top up which drawers water from my rain tank, if empty it switched over to my Sydney Water supply.
I last measured salt on 2/2/17 and it was 5000
I last did CYA 26/2 and I took a punt at the reading as it was below 30 so I guessed 15. I put in 690mg CYA which is worth around 20ppm on 26/2/17. Reading today was still below 30. I cant remember ever having a good reading of CYA.
I have an auto top up which drawers water from my rain tank, if empty it switched over to my Sydney Water supply.