Hello...new to forum - Black Algae

[Diaz92083]

Hi, looking for advice on killing/controlling black algae.

I live in San Diego - warm all year (not rubbing it in, just giving you a an idea of the conditions!)

Thx,
Mario

[Watermom]

Hi and welcome to the Pool Forum!

We'll need some additional info to be able to help.

1. What kind of pool is it? What is the volume?
2. What size pump and what kind and size of filter?
3. Exactly what all have you added to the pool, meaning ingredients and not just product names like 'shock.'
4. What does the water look like?
5. Do you have a drops-based test kit? If so, what kind? Post current numbers.

If you don't have a good drops-based test kit:
The test kit that we think is by far the best is the Taylor K2006 or 2006C (better buy). Not available locally but you can get it through this link that takes you to Amazon: http://pool9.net/tk/

But, in the meantime, go to Walmart and see if they have the HTH 6-Way drops-based kit (no test strips!) and get that. If they don't, get an OTO/Phenol Red kit (yellow and red drops) instead. Use it to test and then post your numbers. Also while you are at WallyWorld, get several jugs of their generic 8.25% bleach and a couple of boxes of 20 Mule Team Borax (laundry aisle).

Repost with requested info and then someone here can try and help you.

(Until you registration is completed, you won't be able to see the rest of the forum while you are logged in. So, copy that link and then paste it into a browser window after you log out.)

[PoolDoc]

Some ideas, huh?

1. Maintain chlorine levels per the cl-cya chart: http://pool9.net/cl-cya/
2. FOR CONCRETE POOLS ONLY: brush algae spots with an SS bristle brush, regularly.
3. Maintain a low phosphate level. (Only works if you are ALSO doing #1 above!)

There are other products that will kill black algae, like monochloramine or strong copper algaecides . . . but they have severe side effects.