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  1. jwfrank

    Choosing correct flow rate for chlorine dosing or metering pump

    Many thanks!!!! I went with the 0607 model
  2. jwfrank

    Choosing correct flow rate for chlorine dosing or metering pump

    I posted this on a Stenner thread. I will try a new “generic” thread. basically my question is: should I choose a flow rate for a back pressure higher than what the pool filter shows? Would it reduce the run time of the dosing pump because the flow rate is higher? I am buying a replacement...
  3. jwfrank

    Stenner liquid chlorine pump - How to choose and install

    Please forgive me if this has been answered. I am buying a replacement solenoid dosing pump for liquid chlorine injection. From years of experience, I know that I regularly use between 1 liter and 1.25 liters PER DAY to keep my free chlorine level at 2-3ppm which is fine for my pool. My question...
  4. jwfrank

    Dolphin S300i caddy assembly problem

    Thanks for your replies. Wheels seem like soft plastic. And I meant to say in my first sentence, "the robot seems to be a great PRODUCT" not problem
  5. jwfrank

    Dolphin S300i caddy assembly problem

    Just purchased Dolphin300i and it seems to be a great problem. But I stumbled on the first page of the caddy assembly. I could not get the plastic plate off to use the 2 screws to hold the verticle pole. I did not want to force it and break the plastic. Any suggestions? many thanks (See...
  6. jwfrank

    Dolphin S300i filter basket micron question

    Thanks for fast reply, Dave. Actually, my pool water looks like yours, crystal clear. But I know when I have used the aquabot, the fabric filter very often is dirty and I don't mean with what it has collected from the bottom, but with what I would call "dust". I wil see if the Dolphin also...
  7. jwfrank

    Dolphin S300i filter basket micron question

    I am replacing an Aquabot Viva whioch has given good service over 7 years. Based on reviews on TFP, I have chosen the Maytronics Dolphin S300i. the Aquabot had a fine fabric filter bag which cleaned down to 2 microns, good for fine dirt and silt. I note that the S300i has 2 options, one for 30...
  8. jwfrank

    Muriatic Acid Consumption and Borates

    [How in the world did people care for their pools before the age of the internet?] Amen to that. And especially TFP !! I live in Italy and rely on this excellent web site as a professional text book. thanks to all those who give up so much of their time to contribute answers to us newbies and...
  9. jwfrank

    spa thermai blanket and pH, will blanket control pH?

    thanks, Richard. I was hoping you would see the post and weigh in with your always-welcome advice. Does it make sense to you that preventing outgassing of carbon dioxide might actually REDUCE pH, not just keep it stable? To help stem pH increasing before the blanket, I had been keeping TA...
  10. jwfrank

    spa thermai blanket and pH, will blanket control pH?

    i recently decided to replace my hot tub cover, and in so doing, came across the idea of using a termal blanket (closed cell polyethelene foam, supposedly clorine resistent - but after receiving it I have to wonder if one needs to pay the premium for this from a spa store ??) My goal was to...
  11. jwfrank

    Closing an in ground pool

    Thanks, Richard. I guess I am lucky in finding no algae on pool opening. Certainly water temps sometimes are above 60 degrees before opening, and I have read your posts, or others', stating that this is one key in not starting algae growth. I DO use Polyquat on closing so perhaps that is a...
  12. jwfrank

    Closing an in ground pool

    Thanks, Richard. I am also considering keeping the pump running during the winter. I live in Italy and am not concerned about the pool freezing nor freezing temps in pump room. I have a peristaltic pump which dispenses chlorine. My pool is covered with a winter cover. My question is: should I...
  13. jwfrank

    Temperature Effect???

    I googled temp effect on CSI and came up with this post. I use Pool Calculator app and measure both CSI in pool at 68 degrees and hot tab at 102 degrees Assuming pH at 7.8, TA at 80. Borates and CYA both at 40, CsI changes from .1 at lower temp to .39 at higher temp Why?
  14. jwfrank

    18% Stabilized chlorinating solution

    Thanks to all who responded 1/ definitely a liquid 2/ weight is indeed 55 pounds. Not sure how many gallons/liters. 3/ I indeed tried testing. Using JasonLion's provided formula: 10ml into 1 liter twice, then using FAS-DPD, I needed 36 drops to change the red liquid to clear. Jason had...
  15. jwfrank

    18% Stabilized chlorinating solution

    JamesW, thanks for taking the trouble to answer. I note that you are an industry professional I attach a picture of the label from the chlorine container. Though in Italian, you can see the relevant items. 18% and stabilized. I did a search on swim-clor and was led to the Bison Labs...
  16. jwfrank

    18% Stabilized chlorinating solution

    Bison Labs makes an 18% chlorinating solution which is stabilized. Bison makes it under 20+ different names including Crystal Aqua , Chlorisan ,Swim-Chlor http://www.pesticideinfo.org/Detail_Pro ... _NR=038942 I am thinking of using it in my Liquidator, and as a means of adding some CYA which...
  17. jwfrank

    Floating electric pond skimmer for a pool?

    Has anyone thought of or explored the idea of using an electric pond surface skimmer for the sides of a pool where debris collects because of the water flow? here is one by OASE for example http://www.oase-livingwater.com/en_EN/w ... oducts_pi1[product]=157 Flow rate is claimed to be 925...
  18. jwfrank

    pool skimmers other than poolskim and dragonfly?

    I bought a house with a poorly designed infinity pool 16x40 ft. So I don't keep the water level up to the infinity edge, and the pool doesn't have built in skimmers/scuppers. It does have 2 powerful returns along the long wall (north) and the eyeballs direct the water to the south wall, the...
  19. jwfrank

    Does CYA get used up or disappear? definitive answer please

    Re: Does CYA get used up or disappear? definitive answer ple Thanks again, Richard
  20. jwfrank

    Does CYA get used up or disappear? definitive answer please

    Re: Does CYA get used up or disappear? definitive answer ple Richard, my pool is uncovered. I have a poorly designed infinity pool, so I keep the water level five inches below the pool edge. Therefore, there is no rain-caused run-off. And there are no scuppers - meaning I clean the pool surface...
  21. jwfrank

    Does CYA get used up or disappear? definitive answer please

    Re: Does CYA get used up or disappear? definitive answer ple Richard, I have the pool open five months June through October. I don't add chlorine during winter months when pool is covered. But water has been clean enough to enable 4ppm chlorine to be present at opening. I backwash twice a year...
  22. jwfrank

    Does CYA get used up or disappear? definitive answer please

    Re: Does CYA get used up or disappear? definitive answer ple BBBeliever, thanks for your time and post I have been using a Liquidator for the last 3 summers. Am very happy with it, and obviously, I havent needed to add CYA. Over the years, I have seen CYA drop about 20ppm/year which is why...
  23. jwfrank

    Does CYA get used up or disappear? definitive answer please

    When I started using this site 4 years ago, as a complete newbie, I quickly learned that CYA will ONLY diminish by splash-out. And yet, I have noticed my CYA has fallen from +100 levels to below 30 levels - and I have virtually NO splash out. (I add chlorine with Liquidator.) By chance I have...
  24. jwfrank

    portable underwater speaker

    Thanks, Bruce which do you/did you install? I have found two on the internet: Aquasonic by Clark and another by Lubell Labs Both companies make post pool production and built-in versions
  25. jwfrank

    portable underwater speaker

    I have a pool and i would like to listen to ipod music when doing exercise laps. I am looking for a portable waterproof speaker that I can lower into the pool connected to an amplifier connected to the ipod I found only one post dating back 3 years Does anyone have any recent experience with...
  26. jwfrank

    Liquidator: in-line debris filter/screen

    Bruce and Dave, what material is the screen on the strainer you use? Is it metal or plastic? I have found a seemingly fine strainer but the seller is recommending stainless steel over Polypropylene. (http://www.vacmotion.com/In-Line%20Strainers.htm) While the water flowing FROM the pump...
  27. jwfrank

    Liquidator: in-line debris filter/screen

    Simicrintz, I found the Polaris part on the internet. Price is way too high at $75 for the assembly. I will be able to find another one on the internet, now that I know what works. Thanks
  28. jwfrank

    Liquidator: in-line debris filter/screen

    Thanks to u both. Bama Rambler: I certainly should have placed the intake line AFTER the filter. I have an option to close the hole I have made where it is now, in the pipe leading TO teh filter and drill a second hole in the elbow AFTER the filter. My elbow (the only place available) is...
  29. jwfrank

    Liquidator: in-line debris filter/screen

    For some reason, when I installed the LQ a year ago, I installed the water in-take line (pressure) in the pump outflow and before filter. (I believe I read that would increase pressure) Because the water isnt filtered, I sometimes get small debris that pass through the pump filter, and are...