Hi, Waterbear's comments are great, as per usual. What wasn't addressed was whether cl would, in a 'StarTrek-esque phaser' fashion, totally destoy the algae - it won't and can't. The cl will kill the algae, but it's up to the filter to remove the carcases - which is where WB's advice comes into play, i.e. keeping the filter able to do it's part.
Last year I posted my standard advice on being a part of the 'Cartridge Family' (for some reason I can't find it here anymore) here's the riff:
Buy another cartridge (or set if applicable). It will probably be cheeper today than it will be next year (or in 2-5 yrs), when you have to get one. Use the two of them (changing and cleaning them after a ~ 5 lb increase in pressure - except when faced with an algae or other 'huge load' problem then designate one of them for 'heavy load' ) After the first one is getting close to the end of it's 'useful life', put in the clean one, but keep the old one for it's 'heavy load' function, and be prepared to spend the $ for a new one (set). & repeat the cycle using the older one for heavy duty thing as per above. Always having a back-up cartridge just makes sense to me, a little money now can prevent a big problem in the future.
Just MHO - Good luck with the pool -- Waste
ps. keep us posted, we're rooting for you!
pps - I am not affiliated with the cartridge industry in any way shape nor form (I personally don't like them - but they're good for many folks' situations)
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