When does filter sand need to be replaced

Gradywhite3535

Well-known member
Jun 22, 2017
54
Glen cove/ new york
When should filter sand be Replaced? I have clear water but have these little things floating. Maybe something from
the trees(looks like plankton lol). I don’t know if the sand isn’t filtering the water. I’ve only used it for about 3-4 months last year. Also if I put the recommended stabilizer and chlorine is it safe to swim in if levels check out?thanks guys
 

ship of fools

Well-known member
Nov 9, 2011
596
Albany, NY
Never - search on here for deep cleaning sand filter and follow the instructions.

I did change mine because it's in a shed and I didn't want all of that water flowing out into my shed.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,701
Laughlin, NV
Baquacil -- it is a mouthful

OP -- as far as your stabilizer and chlorine.

For the CYA - Add the CYA by using what we call the sock method. Get an old sock (no holes) and put the measured amount of CYA. Tie the sock closed and either suspend it in front of a return (hang it from your brush pole works with something weighted on the deck) OR if it still allows flow thru the skimmer, place the sock in the skimmer. Every 15/20 minutes give the sock a squeeze to speed up the process. Please DO NOT follow the directions on the container of CYA to just pour it into the skimmer and don't put the sock in the pool as the CYA is acidic and can bleach/stain pool finishes.

Add the Liquid Chlorine to get your FC to the target level based on your expected CYA ppm using [FC/CYA][/FC/CYA]

You can swim at any time during that process.

- - - Updated - - -

How are you testing your pool water chemistry?
 

Gradywhite3535

Well-known member
Jun 22, 2017
54
Glen cove/ new york
I have a Taylor k-2006 to test... I used the sock method yesterday with the stabilizer and added chlorine. My plan for today was to test the cya then add the recommended amount of chlorine to the chart and test the fc level 45 min after adding chlorine and then test it again around sunset just to see the level it will be at around that time. Any thing else i should do or know? Thank you
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,701
Laughlin, NV
Great. You should wait 24 hours after all the CYA powder is dissolved before trying to test for it in your pool. If you know how much you put in, it is there.

Just check your FC and pH daily and add chlorine every day.