Adding liquid chlorine when going away

[Spanglish]

Hi I’m new to the forum living in the south of Spain and am planning a four day trip which leaves me with a bit of a dilemma as I add 14% liquid chlorine to my pool on a daily basis as required due to heat prior to changing to a salt chlorinator. I have a 65000 litre mosaic tiled pool with a cya level of 65 ppm at present and do not really want to put pucks in whilst away as we’ve not had rain for so long and don’t want to raise cya any higher if I can help it. I wanted to ask if adding say a weeks worth of liquid chlorine (7-10 litres) would do the trick rather than asking a neighbour to add it each day and if this would cause any potential problems? I keep my FC level at 6/7 ppm at present to compensate for cya level as not in use for winter.

Any advice appreciated

 

[Texas Splash]

Based on your CYA (let's say 70) and our FC/CYA Levels, you could actually take the FC up to 28 (TFP SLAM level) and be fine. The FC will fall, but should get you through 4 days.

 

[Spanglish]

Hi Texas splash thanks for reply, do you mean raise fc to 28 ppm? How would this affect ph?

 

[Texas Splash]

do you mean raise fc to 28 ppm? How would this affect ph?

Yes, increase to ~28. It will have a temporary effect on the pH (increasing), but that will go back down to normal once the FC drops in 3-4 days. In that short time it won't have any ill effects on the pool, but should prevent algae.

 

[Spanglish]

Would I still need to raise this high as I already use a weekly algicide.

 

[Texas Splash]

Would I still need to raise this high as I already use a weekly algicide.

When elevated, chlorine can consume an algaecide, so you have to make a decision as to keeping the FC on the low-moderate side and supplement with algaecide, or just disregard the algaecide and let the chorine do the work of preventing organics from trying to grow. Same concept here in the US as owners prepare to close for the winter, difference being their water is getting cold.

 

[Spanglish]

I’ve been using the algaecide all summer keeping the fc 3-4 with the cya originally at 89 with no problems, do you think if I continued same as summer with my cya now down to 65 and hopefully continuing to drop further with backwashing etc & algeacide weekly this would keep pool safe from algae? Don’t have a cover but clean weekly.

 

[Texas Splash]

do you think if I continued same as summer with my cya now down to 65 and hopefully continuing to drop further with backwashing etc & algeacide weekly this would keep pool safe from algae?

If things have been going well for you this long, you could just stay the course. We always try to encourage members to follow the TFP FC/CYA Levels for optimal FC-to-CYA balancing, but you seem to be doing well thus far. With an FC that low, the algaecide should not be effected.

 

[Spanglish]

Thank you Texas splash, sorry for my very late reply I will look at the link you suggested.