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What does R-0009 sulfuric acid .12N equate to in muriatic acid? In other words, as far as lowering the pH and carbonate level, R-0009 = 5% MA?

I did some testing and come up with the following calculations that I thought others may be interested in: R-0007 is thiosulfate, used to lower FC, and is used with the TA test and drop based borate test. Each drop of R-0007 in a 20ml sample will lower the FC by 11.0. Each drop of R-0007 in a...

For some reason adding another drop of R-0011L seems to help me with the color shift to blue. Is there anything wrong with accuracy by adding another drop? Even thought about adding 2 drops of R-0011L to see what happens.

I've seen where people describe an unusual situation where the water turns green for a short period of time after adding chlorine then clears back up. This isn't happening to me but it peaked my interest and I never saw a definate conclusion on what caused it. If I have to I'll dig up the...

Anyone care to elaborate on this story: http://www.ozy.com/acumen/the-truth-about-what-happens-in-the-pool/33079?utm_source=AOL1&utm_medium=cpc&utm_campaign=cpc%E2%80%8B&icid=maing-grid7|main5|dl9|sec1_lnk3%26pLid%3D1263705741_htmlws-main-nb

The recommended CYA levels for bleach pools is 30-50 here: Pool School - Recommended Levels Now here it is basically saying 30-60 is recommended: Pool School - Chlorine / CYA Chart Which is it? I assume this is an error and should be updated. Confusing to anyone who happens to run upon both...

Does dead algae, of any kind, tend to settle on the bottom, float on the surface, suspend in the water, or all of the above?

Can you compare the same buffering ability of borates to TA? Really the question I'm asking is: How many ppm of borates = the same buffering power of 10 ppm of TA?

I'm trying to see the relationship between changing sample sizes for water testing. Red is the instructed sample size. FAS-DPD Chlorine Test Sample Size... 1 Drop = ? ppm ..... Other Reagent Drops Amount ...................................... Precision...

Calcium Chloride Dihydrate has a density of 1.85 g/cm3 so 1 gallon (128 fluid ounces) of Calcium Chloride Dihydrate should weigh 15.44 lbs (247.04 oz weight). So 1 ounce (weight) of calcium chloride dihydrate should be 1.93 fluid ounces volume. 247.04/128=1.93 My calculation must not be...

I'm seeing MPS will show up as CC in a DPD test and FC in a FAS-DPD test. http://www.troublefreepool.com/threads/80794-proper-use-of-chlorine-and-non-chlorine-shock-to-extend-life-of-water?p=694546&viewfull=1#post694546 What I can't find an answer to is whether or not MPS shows up as CC in the...

Everytime I go into a thread the site is calling ckeditor.js then calls for 5 files by the name of attachment.php?attachmentid=randomnumbershere. It is slow to load on my end and aggravating. The main problem is ckeditor.js. What is it for? Why is it not cacheable so it doesn't have to download...

When testing my CYA level I usually pour the the test liquid back in the bottle and recheck it a few times and am pretty consistant about where I see the dot every time. On 5/13 I tested my CYA level and found it to be around 22 ppm. I added 2 lbs 6 oz of 99% Trichlor (All were 1" except for...

I have high TA fill water and I usually just let my TA come down over time but this year I'm going to aerate to lower it. My TA is 110 ppm and with my aerator setup it took me 6 hours to go from 7.2 to 7.4. Not hardly what I was expecting. Im in the process of improving my aerator. I have a 2...

When I opened my pool my CYA was a bit low and my TA was 110 because my fill water is high. I had some leftover 99% Trichlor tabs leftover from years ago so I used them to bump up my CYA some and they are almost dissolved. I thought I could figure what my TA would drop down to in PoolMath in the...

Anyone know what the weight % is for 15% Sodium Hypochlorite trade is off the top of their head.

Wouldn't activated charcoal remove impurities from the water if one had a big bag of it in the skimmer? Would it remove cya, chlorine, calcium and other such things as the water passed over it?

Just happened to be figuring for an oval shaped pool and noticed my math and pool math doesnt come out the same. To figure area for an oval shape I use this formula. Say for 1000 by 500 feet oval shape with 10 foot depth. width radius (250) x length radius (500) x 3.14159265 (pi) =...

I'm reading sometimes one can have ammonium when opening a pool and it takes a lot of chlorine to remove it. My question is how many ppm of FC does it take to remove 1ppm of ammonium? Just curious about the load on FC.

Maybe I haven't done something right, but I have selected "instant email notification" in general settings and it doesnt notify me at all. I have only a few posts so maybe that has something to do with it.

Been browsing for awhile. Figured I would say hello.