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Ended yesterday at FC at 4pm of 13.5 at that point we turned the heater on and put the solar cover on (need a heater in New England!!) Tested this morning (twice) and FC was at 15.5. Is that possible to go up because of adding the heater?? thanks!!

Ok so a mathematician I am not �� That will teach me to use the pool math tool. I tested this morning and FC is at 21.5 and CC is 0. Pool is crystal clear and I've been brushing the stains multiple times a day. Stains are fading. I really noticed that this morning. Obviously my...

So 8 gallons of bleach added. I'll test later tonight then tomorrow morning to see if I need to add more (which I probably do). I forgot to ask how many gallons to pour in so I just added all I bought today. There is no sun out today (cloudy and some drizzle) however we'll have sun for the next...

Oops missed putting the PH it's 7.8 so on the high side. What can I do to bring this down? Also is my CYA too low? Need to go get some bleach now ��

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Got my TF-100 kit last night and just did my morning test at 9:00 am: FC -1.5 CC - 0 -color never changed -can this be correct? Alkakinity - 150 CYA -40 what do I gobftom here to get the stains out? Thanks!

I'm still a little confused on the chlorine tobuy. I know liquid chlorine which I've always used (purchased from pool store). However, I can buy household bleach?! Is shock & liquid chlorine the same?

Wanted to update. I tried the chlorine tablets and they worked. Lifted the stains right up on the test areas. I have my new test kit coming early next week (TF 100 and speed stirrer). After testing I'll up my FC to whatever % is needed based on CYA results. Do I need anything else? (Besides...

I have my new test kit (TF 100) coming early next week. Today I tried both the chlorine tablet and Vitamin C. chlorine took the stains right off;vitamin c did nothing. I tried in a few locations (same tablet) and the stain was lifted. What are my next steps? Well, after I get my test kit and...

Thank you!! It's definitely depressing to look out and see!! We've never had this ☹️ Hopefully something can fix it. The problem is figuring out exactly what it is. I know at the opening after adding a lot of shock our copper level was over 3 and we had brownish stairs too. ? The stairs are now...

I have some dark staining going on with my almost 4 year pool (which we've never had) so trying to buy these products to figure out (or rule out) what it is. Thanks in advance!!! Also any possible clues to figure out what this is would awesome!!

Thank you for responding and the warm welcome :hockey: when I brush nothing comes off. I haven't tried those tablets yet or the vitamin c. Just learned about those from this forum :) I will have to give that a try. The placements of these stains are very strange. Typically that's where the...

Hello! I'm new to this forum and admittedly clueless. I posted a picture of the stains I'm experiencing. My once crystal clear blue pool has these nasty marks after opening. Help!!!:(