Recent content by Atredeis

Thank you! I'll have them quote the job.

Hello all, My wife and I are considering re-tiling our in ground pool. The tile is from the '70s and the grout is failing. (coming out in 1/4" chunks) T he marcite was re-done with diamond brite in 2006 and still looks great. Also, we want to have the decking looked at and a solar heater...

Thanks for all of the input. Found the OTO problem. I was using the DPD reagent.... :/ they both have yellow caps. As far as the color, may have been rain borne debris. There is a tree overhanging the pool enclosure and fine stuff can get washed in during heavy rains. It must've oxidized as...

I do have high metals and add sequesterant (HDEP) monthly. Could be almost time for more. The color descriptions were of the pool surface. I can see the barraccuda pretty well. Any idea what might foul the OTO test? When I was shocking, it would turn orange.

Correct. The green/yellow is very faint. I wouldn't know if it hadn't been sparkly yesterday.

I checked my chlorine tonight and the test results are: FC: 14 CC: 0 pH: 7.5 CYA: 50 CH: 260 TA: 90 Salt: 3100 The pool looks slightly yellow/green instead of it's white/blue. Have been getting heavy rains the past few days. The SWG is set at 45%. Any ideas? I might put a jug of clorox in to...

We had some trouble with our dog being shy about the pool. When we put her in, she got a scared look in her eye and went for the nearest edge. Afterwards, for a year, she would go the other way if we were in the pool. This summer, we got her a life vest and floated her around in that for a few...

Here some quick statistics of the NTU measurements taken. 50ppm standard: STDEV 18.92280971 Mean 156.5454545 Median 159 MAX 187 MIN 130 Error 28.5 25ppm mixture: STDEV 19.65275368 Mean 81.25454545 Median 72.1 MAX 111 MIN 54.3 Error 28.35 It seems the NTU reading gives tighter grouping than...

Got my hands on some glassware and the Hach 2100Q this morning. Bear in mind that this was an industrial environment vs. a carefully controlled laboratory. I'm sure much error can be eliminated with better instrumentation and control. Short Answer It seems one can take the NTU reading of the...

Another challenge might be the range of measurement. The 2100Q measures from 0-1000 NTU. If the CYA samples are at the high end of that, a dilution might be required just to get a reading. Another thought is that the CYA to NTU relationship may not be strictly proportional. This thought comes...

Does anyone know the relationship between CYA and NTU for the TF-100 test kit? If not, I guess a quick and dirty two point calibration could be done using the 50CYA standard and dilution. NTU is a useful measurement of turbidity. Following is quoted from...

Re: A Better CYA Test Kit? Thanks Jason, new topic started with thorough background. Please delete this post.

Re: A Better CYA Test Kit? Does anyone know the relationship between CYA and NTU for the TF-100 test kit? If not, I guess a quick and dirty two point calibration could be done using the 50CYA standard and dilution. I have use of a Hach-2100Q and would rather measure the turbidity directly...

Just wanted to thank everyone again and post current test results. pH: 7.5 FC: 7 CC: 0 TA: 70 CH: 350 CYA: 45 (just added some a few days ago and am letting it climb) The water looks spectacular. I'm still getting some minor organic stains on the bottom. About 5 brown splotches in random spots...

Is the TA test similar? After 5 drops, it turned red, then back to green. After 7 droips, it turned red and stayed red. 7:00am pH: 7.2 FC: 20 (it rained last night) CC: 24 TA: 70 CYA: 40