I have to backwash very frequently and to get the (way undersized) filter clean enough so that I can go more than two days between backwashing I have to use a lot of pool water. I would say about 4" of water per backwash; ~500 sq ft pool. So most weeks I have to use 8" of water from pool for the average two backwashes per week. I think I will be able to put the new, much bigger Pentair Quad 80 in next week so will be backwashing much less often.
Anyway, I'm having to use so much CH increaser because of so much loss weekly. [EDIT] The savings in not having to purchase so much CH increaser will pay for the new filter in no time. [end edit]
Right now it needs about 25-30 lbs to bring it up to acceptable level. I just purchased only 15 lbs at Leslie's this week thinking it was a 25 lb bucket.
A couple of months ago I did the AA treatment to rid the pool of iron staining that comes from the silt that is dragged into the pool by dogs, with lots blown in also. I'm adding more than maintenance dose of sequestrate every couple of weeks. BTW... keeping pH a bit less than 7.5 and sequestrate is slowly releasing the scale on horizontal surfaces which I like.
Dilema ..... hope there is a solution. Advice please. What affects will there be on the CH levels with continuous sequestrate application? Will the added CH increaser be locked up by the sequestrate? How do I manage this? Right now my CH is 175. I can't seem to get it higher because every time I purchase it I don't get enough along with the loss from backwashing. So if I add the 25 lbs of CH increaser this weekend (backwashing today first), which, in normal circumstances would bring CH up close to 288 or add more to bring it up to 300+ will the sequestrate lock up a lot of the calcium?
With the CH being depleted so fast do I need to panic each time it test below 250 and instantly add more CH increaser or do I have a bit of time to bring it back up a bit without damaging my 13 yr old plaster any more than my years of "abuse" prior to TFP? Lets say it goes down steadily for a few weeks, which it does. CYA is also being depleted. TA not such a problem as baking soda is so cheap.
I have some 3" trichlor tabs in a floater right now, but with the water being so cold they are hardly dissolving at all.
How do I manage this?
Many thanks, gg=alice