using the bbb chart

[sobrien2]

the 2005 does allow you to go above .5, you yous the different increments on the side of the tester then multiply by 2 or 5 depending on which scale you use. I know the dpd method is easier. I have been in the water business for over 25 years but when I retired I lost my access to the DPD packs. I have to say pool water is much harder to deal with than city water..pool is very clear so do i need to keep cl level above 10ppm? do i need to take the tablets out, I have no issue putting them to use elseware. How long do I need to keep at shock level? Thanks

[Watermom]

Do this. Test the water this evening. Then, add enough bleach to take the chlorine back up to 20ppm. Tomorrow morning within an hour or so of sunrise, test the chlorine again and post your readings. We are looking for overnight chlorine loss. If you lose no more than 1ppm of chlorine overnight, then you can let the chlorine drift down and keep it between 5-10 all the time. If you drop lower, you risk algae. But, if you do lose more than 1ppm overnight, then you continue to keep it at shock level until you do pass the overnight test.

If you don't use the tablets in your pool, what other uses are you talking about. I'm curious.

[sobrien2]

added 121 l of bleach. I will test again in the morning. Is there no need to float tablets with this method? if not I have a neighbor that has a blow up pool that will use the tabs.

[sobrien2]

I checked the cl level this morning it is hard to tell with this tester. still looks like its near 20ppm. What i did see again was what appears to be sand in patches on the bottom of the pool again. I was told before this is decaying algae?

[sobrien2]

I am adding a 121 oz of bleach each evening to keep the cl level at 20ppm till my tester comes in, can anyone tell me why areas of dirt keep showing up on the floor. Is this algae that is decaying in the water?

[PoolDoc]

Sorry, you didn't get a helpful reply.

I assume the problem is still going on? If so, FEEL the dirt particles.

=> If it's sand from your filter you'll be able to feel the particles. If it's sand, try using the "rinse" position on your filter valve (assuming it has that position; most do) for 15 seconds after you backwash. Then turn the handle to "FILTER". Sometimes, if the pump is pushing sand OUT of the filter during backwash, some of the sand will get into the pipes, and then into your pool once the FILTER position is again used. The RINSE position can avoid this.

HOWEVER, you'll need to watch out for sand loss: if it continues to occur, you'll end up with a filter that can't filter!

=> If it's NOT gritty (like sand) but will sweep away, there's a good chance it's mustard algae. Let us know, and we'll help you with that.


By the way, I've upgraded your forum privilege level.

[sobrien2]

I have continued to run the cl at 15 +ppm, waiting for the rest of my test kit to arrive. I had the same sand looking issue last year. I always rinse following a backwash and I have not backwashed following a vac and the sand still is showing up. Its not in great amounts, but in the creases and bumps of the liner. Any Ideas?

[PoolDoc]

Is it sand?

Get some and see. If it REALLY is sand, it's almost certainly from your filter.