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Did they blow out and seal all the lines? yes Is the filter below the grade of the pool? yes Is there water in the pool? yes, but below the skimmer.

We are having unusually high temps here in Iowa (upper 50's). The snow is all but melted and I noticed I have water running out of sand filter (from our sight glass and drain). See photos. Is the filter lever in the wrong position (winter hiver) ? why is this happening? We had a local company do...

So I have my pool closed the other day and noticed they added the following chem's: 4 gallons of liquid chlorine 1 qt of proguard algae 60 1 proguard stain scale inhibitor I wasn't aware they were going to add these until after I was invoiced and I wasn't home when they did closed it. Lesson...

yes the water has cleared no visible signs of algae. In response the previous post, I have been raising the FC level to 12 to compensate for the loss during the day. I raise to 12 in the evening and it's at 6.5/7 24 hours later. I will give a FC level of 8ppm a try and see what it drops to. thx.

Thanks for the reply, so the question remains... why am I still adding 2+ Gallons of bleach per night? do i need to raise my CYA?

Is it possible that I have black algae? The pebbles a mixture of light colors and dark.. tough to tell if there is algae at times.

Not within the last 5yrs (since I have lived here).

33yrs old (built in 1976)

Tonight Sunday, still a bit cloudy. FC=6.5ppm added about 2G of bleach to get to 12.

Saturday, FC: 7ppm

Started scrubbing the sides and noticed more green/cloudy dirt/algae. I backwashed and then vacuumed. I then backwashed again. I noticed that I picked up a 'baseball' sized amount of sand in my pantyhose over the skimmer (which I originally thought was from the filter). I now realize that this...

FYI - FC: 6.5 from last night (friday), I added about 2G of bleach to raise it to 12.

Sounds great, I will report back with how things go after the weekend. Thanks again!

FC: is at 6ppm tonight. I am comfortable with my CYA at 50, do you think it should be more or less? It's definitely an art to the CYA test, I am planning on testing myself and then having the pool store test it this weekend. Over the course of the last 2 months, I have added about 6lbs of...

FYI: I live in Iowa.

Thanks for your help! I measured again after not adding any bleach last night, the FC this morning is: 10.5ppm (no change.) Water is clear, I will measure again tonight.

tonight FC: 10.5ppm, that can't be normal to have a 17.5ppm drop from last night. Where am I off?

So in the "heat of the moment" after I had such a high amount of FC loss from last night. I added 4 182oz jugs of bleach to raise the water to 'shock' level (and then some). My new FC reading is: 28ppm, CC: is .5, TC: 28.5

FC: measured at 8.5ppm, no signs of algae

Yes, the FC level held. The water is cloudy from scrubbing, but it usually clears after a few days. I am going to test again and give my FC results from a partly cloudy day. If my FC levels have dropped significantly does that mean my CYA levels are not high enough?.

"so I just took a reading tonight 9:30pm and the FC level is 17.5ppm." UPDATE: 6:46am FC = no change. Do you think its just inconsistency in the chlorine levels?

Thanks for the response Richard, here is a summary So what happened between your previous posts (here) and this one since this report of algae is new? Did the chlorine get too low -- below around 4 ppm FC or so, assuming your 50 ppm FC is correct? RE: At that time, I was only concerned with...

Okay, so here are my readings from this past weekend: FC: 7.5 CC: 0 TC: 7.5 pH: 7.2 T/A: 170 CH: 500 CYA: 50 I have consumed 8, 182oz jugs of bleach since Friday. I noticed the sides of the pool are a darker shade then the bottom. I decided to "get in" and scrub, since this seems to be the...

Just for clarity, now that my week of waiting is almost up I wanted to make sure that I should retest the CYA level before I backwash, correct? thanks in advance!!

understood. I thought the answer was one week, but I wanted to ask anyway! =)

How long do i have to wait to backwash after adding stabilizer? I noticed the pressure on the filter is slowly climbing.

Thanks for the reply Dave, 1. I checked my FC and it is 8. I just added some this morning. 2. I have added the remaining amount from the 4lbs I purchased. According to the calculator, I should be close to 40ppm with that amount. I didn't want to add too much the first time because I have read...