Recent content by DaveOB

Re: OCLT during the daytime, and bleach drip feeder wasteful Having re-read Bama Ramblers post, I think that what he is referring to, when saying it's just 'sitting around', is the excess FC over and above the FC that is required to keep the water sanitary. So if the 'required' ( minimum ) FC...

Re: OCLT during the daytime, and bleach drip feeder wasteful OK. Great. I fully get the point about the bucket test and agree with your comments. Thanks. About the 2 ppm added - if it is added during the daytime, wouldn't it be less effective as some of it would also be destroyed by the...

Looking for input on 2 items that I have been pondering on. OCLT during the daytime. If my understanding is correct, the main purpose of the OCLT is to determine if an algae problem exists. I fully understand the reasoning for doing the test overnight to rule out sunlight that destroys the...

Hi Jason Again, I thank you for sharing your knowledge and experience. I hadn't considered the CYA effect on that FC for the overnight test. And again, I have learnt something new for today. I am so glad I found a forum with so many genuine experts who are so willing to give up time to help...

Many Thanks for the advice. The above statement, although most likely true based on your experience, I do not understand. My thinking tells me that if there is a problem like algae, that it would consume 'x' amount of chlorine ( in ppm ) over a time period. Why then would it matter if you...

OK. I think 1 last question before I start crunching numbers. During the overnight loss test, do you leave the pump running 24/7 ? ( assuming that the test is being done to prove a problem exists, and not part of the slam process, which would require the pump running ). Dave

Thanks for the advice Jason. Much appreciated. Just a question : shouldn't the slam process first start with an overnight test to actually determine if it is required ? Also, I didn't see anything about using the pool during the slam ?

Day 6 and really happy. It's been 6 days since I started using my DIY color analyzer for the DPD tablet test tube. In all cases, I have used the HTH water tube to measure the 13ml of sample water, calibrated the sensor, and then added the DPD tablet. And in every case, I have noticed the pink...

Day 2 of using the new color sensor and am really confidant with the reading that I am getting. A late afternoon sample gave me a reading of 2.45 ppm. Again we spent more than 3 hours in the pool today, 4 people, lots of sunblock, etc. In addition to now having the LCD display the Green sensor...

Thanks Mike_W Reason for using the transmission lighting is that the color sensor board only has a white LED for reflective lighting, and I needed a green light for this application. I also think that the transmission thru the solution in a light tight container will give more accurate /...

Update on progress Today I completed the enclosure ( light tight for the sensor section ) and coded the Arduino and LCD screen. I used distilled water and household bleach to create a control solution, and created 18 sample strengths between 0.256 ppm and 6.678 ppm. After calibrating the...

Hi dschlic1 I fully understand and agree 100% with your advice and info. However, I am thinking that my pre-measured control samples and data will give enough accuracy for this application. For example : ( simple numbers used to keep the example easy for others ) : The color sensor can...

Sincere Thanks for the advice. I had read about the green light issue before, and think that I have taken that into account in the procedure below. To test the green light theory, I will be making 4 sets of readings for each stage of the calibration tests. First a reading ( actually all...

Hi jblizzle The HTH test tablet does produce a pink color in the water, so I am assuming it is DPD. I am going to use the results to adjust the ( next project ) automated bleach feeder ( based on the color test results ) so am not expecting FC levels to be too far away from my target of 4ppm (...

Well, it's been a few days since I last posted, and I finally found some time tonight to get the test wiring completed. As a side part to this water test project, I have added the following : I am using an Arduino Uno R3 board ( with 16 x 2 LCD screen ), and connected 2 one-wire temperature...