Keeping FC up

Mycall9550

Well-known member
Apr 5, 2017
182
Houston
#1
So I have some algae, but I cant seem to keep the FC up. I'm probably not adding enough chlorine frequently enough, but with a higher CYA I'd expect levels to be higher.

today:
FC 2.4
CC 0.2
pH 8.0
TA 100
CH 270
CYA 100
CSI .29


4/12
FC 1.0
CC 0.2
ph 8
TA 105
CH 270
CYA 90


1) Should I add only 1/2 of the target 4 GAL of bleach, and the 2 qts of 28.3 MA or full amount of both bleach and MA?
2) should I drain and fill to bring down CYA? I dont want there to be so much chlroine it's unpleasant to swim.
 
Last edited:

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
41,197
Tucson, AZ
#2
With algae you need to be following the slam process. That requires much higher FC levels. However with your high CYA it would make more sense to replace half the water before starting the slam.
 

woodyp

Mod Squad
TFP Expert
LifeTime Supporter
Apr 17, 2010
10,216
East Texas
#3
4 gallons of bleach in a 45k gallon pool will not get you to SLAM level if that's what you're asking. I'd drain water to get your CYA to 60, then SLAM it.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
41,197
Tucson, AZ
#4
I also just saw that it's been 2 weeks between your testing. To start the slam you need to be testing every 2 hours or so.
 

Mycall9550

Well-known member
Apr 5, 2017
182
Houston
#5
Ive been brushing more frequently getting it before it's "thick" on the walls, so do I need to slam if I can keep the levels up?
with a CC of .2 does that mean there's not much algae after brush and vacuum?
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
41,197
Tucson, AZ
#9
You need to replace half the water. During the slam you need to brush the entire pool and two that will get rid of the algae.
 

Mycall9550

Well-known member
Apr 5, 2017
182
Houston
#10
Another question, do I load up on chlorine, once balanced post slam, when I'm on holiday?
no automated chlorinator.
Or do I buy tablets?
Am using TFP method now w bleach for chlorine
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
41,197
Tucson, AZ
#11
If your cya is not already too high many people do use tablets while on vacation. Although ideally you could get someone to swing by the house every few days and add bleach.