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Thanks for the replies. I'm using a Hach 17N test kit for the pH. I have muriatic that I can use but I like to use the dry stuff because in the past I've dumped it on the steps and really cleans up the stains (this didn't happen with the stuff I used this year). Maybe there's just a bunch of...

Several weeks ago I added a full 5lb bag of clorox pH down that I got from amazon last year. Didn't change the PH at all. A couple weeks ago I added another full bag that I'd just bought. That maybe dropped it .2. 4 days ago I added a full 5lb bag of pH down that I bought from the local pool...

I usually use LC but my CH is low so I bought some 1 lb bags of DRYTEC 68% cal hypo. Does anyone know how much CH one bag of this stuff will add to a 40K gallon pool? Also, I have some stains and am considering dumping some of this stuff directly onto the stains to see if that would remove...

Anyone have any advice on the best place to get liquid shock in MD. I'm in Howard county. For the past 7 years I've been getting 4 packs of Austin’s Pool Tech Shock (liquid chlorine 12.5%) from the BJs wholesale club in Columbia, but I was there this week and they didn't have it. Maybe too...

I can't figure out the date code. I have a box from last year with code 1617927MA-1(2) Can someone break that down for me? Thanks!

Hello, Getting ready to close here in MD. I shocked and now my FC is at 14, cya is 90, and ph is 7.75. The instructions on the polyquat say to add with FC at 1 to 3ppm, but since the pool is covered and it's cold, that FC is not wanting to drop. I really want to take care of closing the...

Hello, My existing loop-loc cover is shot. What would be the best strategy for replacing it? I think it may have come from a local pool supply place, would they have a record of the order so maybe I could get the exact same thing? Or could I send the old one back somehow (it's pretty big 50'...

I measured the deep end tonight from the edge of the diving board and it was close to 9'. I wasn't able to reach the deepest part. I'll remeasure the shallow when the FC drops enough to get in, but pretty sure it's about 4'. I put length=48, width=18, deep=9 shallow=4 into a calculator I...

Great I will give that a shot. Any words of warning? Is it possible to do damage by brushing too much?

Def using 10ml. The pool is a funky shape: [attachment=0:37nepr4f]pool_sm.jpg[/attachment:37nepr4f] but it is 48feet long and 18 feet wide at the deep end, and has about a 9 foot deep end and a 4 foot shallow end. Could that be 40K?

LOL... Can't really tell any difference if it's closed. Must have something to do with the paramount valves. I've done some testing and it's not the connection between the two paramount valves and it's not the connection between the paramount valves and the filter outlet.

Hello, I'm just getting started and some of my numbers are not making sense. I've had the pool open for a month and I've had the water clear for about a week. I have the pool at 40K gallons because that's what the pool store said it was. Last night I wanted to shock it so I added 2 gallons...

Does anyone know what this valve could be for? There is water running through it when the pump runs. I'm stumped.

Sorry for slacking on the response time. I was pretty sure it was a concrete pool. Can you tell it's vinyl from the pictures? If it is concrete can I wire brush it? All of the surface feels rough. I've had the house for about a year and it wasn't opened last summer. I've used only bleach...

Well I finally got the water clear, and now I can see all the stains! I've been scrubbing these with my standard nylon bristle brush and making no progress. Could these stains be live algae? Should I try a wire bristle brush? Can I damage the surface by brushing too much or too hard? Thanks!

...This morning I dropped .5 FC (15 to 14.5) overnight and the CC is still .5

Update: From 6/1 to 6/9 I was shooting for FC of 10 but not multiplying the drops by .5 (Duh!) so while I thought I was at 10 I was really at 5. Ugg. Embarrassing... I've added a total of 15lbs of trichlor and 6 lbs of dichlor (between 6/1 and 6/6) so theoretically my cya should be 34, but...

Thanks all! I'll shoot for 10 FC then and use the dichlor I have, and go to wallmart tomorrow for cya. The ph is now 7, at a FC reading of 7 so I guess I'll leave that alone? I do have 5 lbs of soda ash I could dump in. How long after dumping in a bag of dichlor should I wait before testing...

Long story short, I’ve been trying to shock my 40K gallon green pool that has not been closed with a looploc cover for at least 2 years. I bought the house last summer. Anyway, I figured I’d shock with some diclor since the CYA tested 0, and some 12.5% liquid shock (details are below). But...

Re: Should I start Saturday morning or wait 'till dark to sh OK - so I dumped in 2 gallons of acid (31.5%) and the PH is now 6.5. Going to try adding baking soda to try to make it go back up.

Re: Should I start Saturday morning or wait 'till dark to sh ... is that a good TA? Should I try to adjust that? I have a bunch of baking soda... Or should I do the PH first. BTW - thank you VERY much for your help!

Re: Should I start Saturday morning or wait 'till dark to sh hmmm... maybe I didn't wait long enough for that other stuff to kick in? I'll recheck after I get back from my acid trip. Just measured the TA and it is 50.

Re: Should I start Saturday morning or wait 'till dark to sh Well I dumped about 8 lb's of the "ph decreaser" in and the ph is still 9.5 (testing with the tft kit it's 8.2, but testing with the hatch kit I have for my well water it's 9.5). Does that stuff go bad? Am I missing something...

Re: Should I start Saturday morning or wait 'till dark to sh yep - typo. It's sodium bisulfate. If I go through that I guess I'll head to home depot for muriatic acid?

Re: Should I start Saturday morning or wait 'till dark to sh I had some leaks. Just bought the house last summer and just getting to the point of checking things out now. Roger on the ph. It's 9.5! There were some "ph increaser" granules here. I plan to mix with water and dump in. Have...

If I can get the water circulating correctly (don't ask), I could start dumping chemicals in this morning. It's going to be hot and sunny here. Is it really bad to start during the day? I'd like to have as much time as possible to monitor and adjust before I have to go back to work on Monday...

No dice