Rising CH and scaling? Help!

[CarrolltonTXPool]

My CH was too high about a month ago so i backwashed to waste before a big rain and a little after to lower it. got t back around 350. now it is back to 460, and i haven't added and hardness. i did just add MA and bleach

Just finished test results
FC - 8
CC-0
PH 7.2
TC-8
TA - 45 (out of baking soda) usually stays pretty solid at 70
CH - 460
CYA - 50
Borates - 40

Any idea where it is coming from? Fill water is a Ch of 6.

Also seem to have a scaling issue maybe? PH was too high, and due to family illness i have been in and out of town alot more than expected and havent been able to keep up with it as much as i would like. Replastered march 2011. below pictures are kinda hard to see with the reflection but it looks like a grayish tone running down the sides. don't have a pic of it, but there is also large build up of white material under the rock overflow of the hottub

 

[Richard320]

Welcome to the club.

What's your pH? That's the critical measurement. Aim low, like 7.4. I keep my pH 7.5 or below, TA is usually around 50, sometimes 60 after a fillup, and my scale is slowly melting away despite CH of 800 right now.

I water my lawn with pool water then refill. Each time, I lose about 3% CH, so it's not the most efficient method, but it doesn't waste any water.

 

[CarrolltonTXPool]

Sorry PH is 7.2 right now. Usually try to keep it around 7.5, but reading it should be a little lower.

So I'm for 7.4 an keep TA a little lower than normal around 50 and it should slowly correct itself? So maybe refill once or twice a week maintain all levels at the "new standard" is the way to go?