Algae, transition from tabs to liquid chlorine, and using CYA level to better protect against algae

GatorGar

New member
Jun 14, 2021
1
Richardson, Texas
First post as brand new to TFP. We are up in years and despite our having very little to no pool traffic, we keep it up and running all year round. The pool is our first and came with the purchase of the home 16 years ago. Most every year we’ve experienced varying amounts of yellow algae while having always used 3” tabs in floats to chlorinate the pool water. We presently want to switch over to liquid chlorine and have purchased the TF-100 test kit intending to soon rely on in-range and maintained CYA and capable chlorine levels to eliminate our perennial algae issues. We are self taught in pool maintenance and ownership and apart from a re-plaster of 1 year ago, we have fully repaired and maintained every aspect of the pool to this date ourselves.
Now, hopefully that suffices as an introduction for the time being. Our question to you fellow pool owners is, Should we plan to break down, fully clean, and recharge our diatomaceous filter before or after initiating shock as part of readying process for the transition?
And just for the record, we live in Richardson, Texas, a suburb of Dallas. Our pool’s capacity is approx. 12,500 gals., and adequately equipped with a 2 hp. pump, a Pentair FNS Plus Diatomaceous Earth filter, and is, yes, in-ground and of plaster construction.
 
GatorGar....welcome :wave: We're happy to have you join us. There really is no transition needed to move from pucks to liquid chlorine. The important question is : Do you still have algae?

There is this nifty program called PoolMath. Either the web version on the computer (found at bottom of page) or the App found for phones. I use the App for my private pool and prefer the web version for helping folks as its easier to fill in and see how you can tweak the numbers.

Do you know what the "clean pressure reading" of your filter is? We only really recommend a full on clean if its laden with algae and pool debris. Can you "bump it" down? So we say do so when the pressure gauge has risen 25%.

After a year of using tablets/pucks, your CYA is probably going to be overly high. This *may* require a bit of draining and refilling to lower that level.

When your new kit arrives please perform an entire run of tests:
FC
CC
pH
TA
CH
CYA
Salt if applicable

Let us know the results and we'll walk you thru it.

Maddie :flower:
 
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