Help locating a replacement T15 cell still under warrantee.

[Nevets]

I am in Florida also and keep my pool heated to 88 degrees and it's over that for several months a year. The pool is open year round. I have an aqualogic and my cell is still going strong so the heat is not the problem, water balance is.
A few tips to maximize cell life, keep your CYA at 80 (very important) an and your TA at 70 to minimize acid demand cause by outgassing of CO2.
Add borates to 50 ppm to reduce acid demand (because of the secondary boric acid/borate buffer system that works in conjunction with the bicarbonate buffer system we call TA to "lock" the pH around 7.7 -7.8 for an extended peroid of time) and very probably chlorine demand (because of the algaestatic properties of borates).
These tips will allow you to run at a lower output percentage and to minimize pH spikes, both of which translate into longer cell life.

I was able to locate another dealer that offered me a better price (almost as good as online) but without the proration - you do what ya gotta do. I still had to pay the tax though.

However, it's obvious to me that I am going to have to rebalance my pool. My pool is an inground with a Premix Marbletite Marquis finish and comes in at about 11000 to 12000 gals is my buest guess but a calculator says around 15K gal. Its an odd shaped pool. It is uncaged, and gets sun from 8:00 am to 7:00 pm right now. My current pool stats according to the pool store:

Salt 4200
CYA 120
FC 1
pH 7.8
TA 105
Calcium Hardness 260
TDS 5001

The pool store recommended that I put in two cups of acid to bring down the pH and 1 gal of liquid chlorine to up the FC level.

My handy dandy PS234 #6477 test kit gives me the following readings:

FC 1.5
CC 0
OTO TC 2
OTO pH 7.5
Alk 80
Cal 300
Cya 70
Salt 3800 ~ 4000

Meanwhile, my new and improved (working) cell allows me to get the following readings from the Aqua Rite control box:

Salt 3200
Temp 92 deg
Volts 24.3
Amps 7.70
40% chlorine generation
~3800 (Instatenous salt test)
AL 0
r 1.40

What is the next recommended step to do. Should I drain and refill to lower the salt level or should I leave it as it is because within one week, the overflow from all the rain will do the job of lowering the salt level for me?

What is this borates thing? If you haven't guessed, I do not have much of a clue about this stuff....

Thanks for your help.