Switching from Sustain Cal-Hypo to BBB

[amber]

This is my first year with a pool and the pool store talked me into the Sustain Cal-Hypo system. I purchased what was supposed to be enough for the whole summer & I have maybe enough chemicals to last me another week or so. I would like to make the switch to the BBB method. I have a Taylor TF-100 test kit just want to know how I go about switching. I read a post somewhere that said something about a possible problem switching with the summer sheild product added in the same year. I put a jug & a half in the 3rd week of March. My water is clear & has been all year.

[dubbedout]

There's really nothing to do before switching to the BBB method. As Bleach isn't any different from what you buy at the pool store (except its cheaper, doesn't add any unnecessary chemicals to your water, its still chlorine). I did the same thing at the beginning of this swim season, purchase a $150 bucket of Dichlor and went through it pretty fast, as I found out that the Dichlor was raising my CYA levels and causing me to have to use more of it to keep the water clear. I do go through a lot of bleach but that's currently due to my CYA levels being over 100 and I'm in AZ where its currently at least 110 degrees daily. You won't regret converting I promise you! My pool is the clearest its ever been now, no more scale on the tiles or anything. I'm constantly getting compliments on my pool when we have people over!

[amber]

I have read alot & feel pretty confident about using the pool calculator & BBB chemicals. What I am not sure about is the Sustain Summer Sheild tests as CC's. So will this cause a problem because normally CC's are cause for starting the shocking process? I always have CC's with this products.

I have read about it in a ton of other threads. JasonLion on TFP wrote this "As long as their summer shield hasn't been added since last summer there shouldn't be any problems simply starting to use BBB, without any conversion process." in this thread: switching-from-sustain-to-bbb-any-concerns-t44236.html This makes me believe that since I added the Summer Sheild this year I may have a problem.
There is also a bunch of info in this thread: fas-dpd-interference-question-t7571.html
I also posted at the begining of the year because I was worried about the CC's: http://www.poolforum.com/pf2/showthread ... ater-right

current test results
FC 6.5
CC1.5
TA 110
PH 7.5
Did not test CYA because I added more yesterday to bring it up to 30-40

[dubbedout]

I'm not familiar with Sustain Summer Shield and couldn't find very much information as to what's really in it, besides the label which says Calcium Hypochlorite 68% and "Other ingredients" 32%. Sounds likes it's some sort of CYA replacement? I have any had to shock my pool once, and that's when I started to get an algae bloom due to my FC levels dropping too low. I never have any CC since switching to bleach. Maybe someone else that has experience with this product will chime in with their experience.

[PoolDoc]

There are 3 basic Sustain products, but the "Sustain® 3-Inch Blue Chlorinating Tablets" are slow-release cal hypo (calcium hypochlorite) should be OK to use. The "Sustain® ¾-Inch Shield Energizer Tablets" are also cal hypo -- probably fast release, and are also probably OK. Do *NOT* use the "Sustain® Summer Shield Chlorine Extender".

Just make SURE that there are no trichlor tabs in the skimmer at the same time as the Sustain tabs; very bad things will happen if you mess this bit up!

[amber]

I feel like I am missing something or maybe I'm not asking the correct question? PoolDoc you wrote do not use the Summer Sheild but I did, I put in a jug & a half the third week in March as I wrote in my first post. I just need to know if I can switch to BBB this year or if I need to stick with Sustain (cal-hypo) until next year when the Summer sheild has worn off?