Pool Draining Pump

[Cbed1013]

I have about a 25,000 gal inground pool which needs to be drained. Would this type of pump work sufficiently to do the job (I know it may take 1 day+, but just wondering if it would get the job done). Thanks!

http://www.amazon.com/Superior-Pump-91250-Thermoplastic-Submersible/dp/B000X05G1A/ref=sr_1_1?s=hi&ie=UTF8&qid=1391102358&sr=1-1&keywords=pool+drain+pump

 

[Bama Rambler]

That doesn't look too bad. At 10' of head it'll still pump 20 gpm.

 

[Cbed1013]

Awesome, thanks...Since I have to repair the plaster once it is empty, I am going to drain all the way. I will test my tap water (fill water) and post the results to get recommendations on chemicals I will need to add right away upon re-filling.

 

[jblizzle]

I would:
Fill and get the water circulating.
Get CYA dissolving targeting 30ppm.
Add 2ppm of FC.
After an hour, test everything except CYA to determine what else needs adjusting.

 

[Cbed1013]

So I drained my pool this past weekend and it is now full again. I tested my FC before the drain and it was off the charts high (25 ppm). I guess having 3 tablets in the pool during the winter in AZ is far too many. I ended up draining about 3/4 of the water and refilling. Right now my levels are as follows:

FC: 4.5
TA: 100
CYA: 60
PH: 7.2-7.5 range

These all appear to be OK to me, but is there anything anyone would suggest adding? Thanks for all the help!

 

[JamesW]

Is this a fiberglass wall with a concrete bottom? What is your calcium hardness?

 

[Cbed1013]

It is fiberglass both on the sides and bottom. CH is high, 400. Came out of the tap that way.

 

[JamesW]

You said that you needed to fix the plaster?

 

[Cbed1013]

Yeah, I was under the impression that it was plaster...but I had a pool repair guy come out to look at, what I thought was plaster damange, only to find out it was a fiberglass pool. Shows exactly how much I know about pools

 

[JamesW]

I'm guessing that it's concrete that was refinished in fiberglass. Just follow the guidelines for fiberglass pools. If you have iron, you could add a sequestrant. Poolschool has lots of good information about proper chemistry.

I would recommend that you change from using trichlor as your primary source for chlorine