Opening Day! Please confirm plan!

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
SLAM going well, water is slowly but surely clearing.

One interesting item. It’s been about 24 hours since opening/pump running....as you can see my picture, all green and algae originally.

However, resting psi remains stable. Return jets look strong. I really was anticipating multiple backwashes - especially in the first 24 hours. Is this normal?
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
SLAM going well, water is slowly but surely clearing.

One interesting item. It’s been about 24 hours since opening/pump running....as you can see my picture, all green and algae originally.

However, resting psi remains stable. Return jets look strong. I really was anticipating multiple backwashes in the first 24 hours - especially given how green the pool was.... yet I haven’t even done one. Is this normal?
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
water is slowly but surely clearing.
Nice! As for the backwashing, hard to tell. Much depends on the amount of material that needs ot be collected, size of the filter, etc. I would't worry too much about it for now. But not sure if this came up before ... does your pressure gauge fall to zero when the system is turned off? Just want to make sure the needle isn't stuck or bad gauge at this point.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Thanks. Yes it does fall to zero when off.

Also, still have good flow from returns. I’m just amazed I haven’t had to back wash considering how green the pool is/was.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Nice! As for the backwashing, hard to tell. Much depends on the amount of material that needs ot be collected, size of the filter, etc. I would't worry too much about it for now. But not sure if this came up before ... does your pressure gauge fall to zero when the system is turned off? Just want to make sure the needle isn't stuck or bad gauge at this point.

I almost want to backwash anyway because the water line is a little to high - impacting skimmer collection a bit. Prob no harm in my SLAM in doing so, even tho pressure is food and returns are good
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
No problem. Keep an eye on that needle when you do so.
Thank you. Backwash complete. Gauge dropped to 0 when filter off and 10 psi during backwash. Came back to a resting psi of 15-16. Prior to backwash it was around 18.

Everything fine - just really surprised psi didn’t rise that much in the first 24 hours.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
If the pressure hasn't climbed and the flow is still good, keep going. You have many backwashes ahead of you.

I say Jugs away! And then you'll have time for another dose before bed!
This morning l, FC dropped to 9 - so before adding more to get to SLAM target of 12, I ran PH (since below 10 FC) and looks like it climbed again - around 7.6. Should I had more MA or just keep pushing with the FC?
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,059
San Dimas, CA (LA County)
This morning l, FC dropped to 9 - so before adding more to get to SLAM target of 12, I ran PH (since below 10 FC) and looks like it climbed again - around 7.6. Should I had more MA or just keep pushing with the FC?
Your choice.

I probably would unless I was pressed for time, like testing before work where I didn't have time to wait between additions.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Your choice.

I probably would unless I was pressed for time, like testing before work where I didn't have time to wait between additions.
Thanks - I measured TA again to calculate how much MA to add to drop PH. TA dropped to 40 - pretty low. That ok for now?
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Yes, but only because it's a vinyl pool. A plaster pool might start etching at that low number.

Buy some baking soda the next time you have to buy bleach.
Thanks. I added the MA. In 30 min I’ll remeasure FC then add the needed amount to continue the SLAM.

Is there any immediate need to get the TA into range? I’ll get the baking soda, but may not be for a couple of days.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Thanks. I added the MA. In 30 min I’ll remeasure FC then add the needed amount to continue the SLAM.

Is there any immediate need to get the TA into range? I’ll get the baking soda, but may not be for a couple of days.
Thanks. - Pool math says I’ll need at least 10 lbs (perhaps more if TA keeps dropping) to get it back up to 70. Any recommendations on type of baking soda/or what to get?
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,059
San Dimas, CA (LA County)
Thanks. - Pool math says I’ll need at least 10 lbs (perhaps more if TA keeps dropping) to get it back up to 70. Any recommendations on type of baking soda/or what to get?
Whatever is cheapest. I saw big bags of baking soda in the pool section at Walmart the other day. They probably also have big bags by the flour and such at Costco and Sam's and the like. Or grab a few boxes at the grocery store. TA isn't really a critical measurement. So if you target 60 and it asks for 6½ lbs, add 6 or 7, whichever is handiest. Maybe it'll be a 12 lb bag and you can eyeball half a bag. It doesn't have to be exact.
 

BPool18

Well-known member
Jun 14, 2018
180
Cincinnati
Whatever is cheapest. I saw big bags of baking soda in the pool section at Walmart the other day. They probably also have big bags by the flour and such at Costco and Sam's and the like. Or grab a few boxes at the grocery store. TA isn't really a critical measurement. So if you target 60 and it asks for 6½ lbs, add 6 or 7, whichever is handiest. Maybe it'll be a 12 lb bag and you can eyeball half a bag. It doesn't have to be exact.
1. Thank you! I’m assuming unscented too - I’ve seen a few baking soda containers labeled as “unscented” so not sure what the default is.

2. You brought up a point that I had a question on. After the SLAM is complete, I’m going to raise the CYA. I recently did this for the SLAM to get it to 30 (sock currently in the skimmer). In order to do that - I had to use about 2.5 lbs of cya (out of a 5 lb bag). How do you accurately measure cya? In this case, I could just eyeball it since it was about half the bag, but in the future, if Pool math calls for more precise measurements, what’s the easier way to measure cya?
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,059
San Dimas, CA (LA County)
1. Thank you! I’m assuming unscented too - I’ve seen a few baking soda containers labeled as “unscented” so not sure what the default is.

2. You brought up a point that I had a question on. After the SLAM is complete, I’m going to raise the CYA. I recently did this for the SLAM to get it to 30 (sock currently in the skimmer). In order to do that - I had to use about 2.5 lbs of cya (out of a 5 lb bag). How do you accurately measure cya? In this case, I could just eyeball it since it was about half the bag, but in the future, if Pool math calls for more precise measurements, what’s the easier way to measure cya?
I'd use a digital kitchen scale, because I already own one.

If you don't have one, consider buying one. I find it is much like a speedstir; once you have it, you can't imagine life without it.