Recent content by 5tan

  1. 5

    Do you really need to shock your spa every week or so?

    I use the SenSafe DPD-1 reagent strips that are $14USD for 100 tests - it's a 10 second test. Following heavy usage, I bring pH down to the 7.0-7.6 level, then add Canadian Tire's Aquarius Pool Chlorine with both pumps on, using the PoolMath/PoolCalculator amount for reaching the 10ppm FC level...
  2. 5

    Do you really need to shock your spa every week or so?

    Using 10.3% pool chlorine, I shock weekly and also after heavy usage, by using the breakpoint chlorination method described below, raising to 10ppm FC and continuing to add more chlorine every few hours until the FC starts to holds steady at 10ppm. Shocks are used to get rid of 2 types of...
  3. 5

    Using a Hot Tub as a Pool in Summer

    I use my Bullfrog A7 (2.24m x 2.24m) as a mini-pool during these recent heat waves. If it's hovering around 30C out, I set the spa to 33-34.5. Heat from the pumps will bring it up to 35.5-36 after a couple hours, and 36 is slightly too warm when it's hot out. If it's really hot out (mid to...
  4. 5

    Scum absorbing products

    Before my water change a month ago, I got a Scumbug from a local national retailer due to people's unrinsed (soapy) bathing suits foaming up my water, it was mildly helpful but I wouldn't say very helpful - still had to remove foam by scooping it out with a frisbee and squeezing out the Scumbug...
  5. 5

    Hot Tub Filter Cleaning Questions.....frequency and best method to clean?

    Agree, just use common sense and know what you're getting in to. You don't need Pennzoil Platinum Full Synthetic or Mobil 1 or any other particular brand name, but you do need API SN (or higher) or ILSAC GF5 (or higher), and in the exact SAE oil weight specified by the manufacturer. The...
  6. 5

    Hot Tub Filter Cleaning Questions.....frequency and best method to clean?

    Yes, that is precisely what I would do. Hose off, then soak in a filter degreaser (I would prefer an environmentally-friendly, phosphate-free degreasing agent), then if I needed to remove calcium deposits, use a 1:10 MA:water solution (this 1:10 ratio comes from page 40 of the 2021 Bullfrog...
  7. 5

    Hot tub chemistry numbers

    I think you probably know the answers already since you have several years of reading about spas and hot tubs. I'm only 6 months into this game, and only use chlorine so can't speak about bromine, but I'll sum up what I've figured out so far: There is no one exact, proper number for any of...
  8. 5

    Hot Tub Filter Cleaning Questions.....frequency and best method to clean?

    The reason for using the tools I mentioned above is to use pressurized streams of water on normal household tap pressure to blast out hair, dead skin, bits of pipe glue, grit, etc from the very deep filter pleats. A good hose with a non-aerated high pressure stream can do the job 80-95% of the...
  9. 5

    Hot Tub Filter Cleaning Questions.....frequency and best method to clean?

    I have 2 coreless filters in my Bullfrog A7. The touchscreen and app prompts me to "Rinse filter with hose" every 30 days and "Clean filter in solution" every 60 days. My water is crystal clear and needs nothing except for 150mL chlorine after each soak (every 3 days) and ~40g dry acid every 2-3...
  10. 5

    Paper wasps under cover

    On that track, if you have icaridin or picaridin (DEET alternatives), spraying that where the wasps are nesting should work. Spraying DEET mosquito repellent will work too, but it may dissolve plastics/vinyl/etc in the area, so try the icaridin/picaridin first.
  11. 5

    How to clean empty spa?

    I would use a teaspoon of Ahhsome gel dissolved with hot water in a small bucket, then soak a good microfibre cloth in it and scrub the water line. This is what I did to clean the waterline throughout the purge, and had no problems with any waterline buildup. A good microfibre is the kind where...
  12. 5

    Is there a minimum level of free chlorine required to work correctly?

    https://www.cdc.gov/healthywater/swimming/residential/disinfection-testing.html Free Available Chlorine Germ-Killing Timetable E. coli 0157:H7 (Bacterium) less than 1 minute Hepatitis A (Virus) approximately 16 minutes Giardia (Parasite) approximately 45 minutes Cryptosporidium...
  13. 5

    Paper wasps under cover

    I would try every environmentally-friendly liquid that dries into a film of something that the wasps won't like. Super-concentrated salt water, super-concentrated borax water, high-strength acetic acid, Carolina Reaper or Ghost Pepper oil, any essential oils you can get a hold of, etc. Most spa...
  14. 5

    Ahh-Some questions

    From my experience, Ahhsome works better when warm, and even in 38C spa water, it's slow to dissolve. I would dissolve the gel in a bucket of hot water first. It should work in the spa at well water temp when well dissolved and evenly spread in the water. Ensure you fill the spa to at least the...
  15. 5

    Chlorine gas released from hot tub water?

    I don't think aqueous chlorine (HOCl) converts directly to Cl2 (chlorine gas) under hot tub conditions. Chlorine gas (Cl2) hydrolyzes in water according to the following reaction: Cl2 + H2O <-> HOCl + Cl- + H+ and then HOCl <-> ClO- + H+ You can calculate the amount of chlorine being added to...