I been waiting for my pool FC level to die down and loosing 1 to 1.5 ppm FC a day and finally I can say that previously without the TF test kit...I been blind...
At 5ppm FC and ZERO CC, I can smell chlorine...nose millimeters away from water
At 3PPM FC and 0.5PPM CC, I can smell chloramine...nose 1" away from water
Today at 1.5PPM FC and ZERO CC, I can't smell anything no matter what. Unless I sweat my hand... put it in water and let it dry by wind..then I can smell "chlorine".
So today I took a party grade bath... ..shampoo and all, remove all sweat and oil from my body, brush my tooth , floss my teeth, Listerine my mouth..scrub here..scrub there and immediately jump in the pool, before any sweat develop.. :P. Took a leisure 10 minute swim just to check the water clarity, pick up some rust flakes at the deep end that keep falling off my sunshade steel frame.
The water visibility and clarity was just so amazing.... , this is definitely a level better than previous best.
It sort of sparkle...its true. If this pool is 165 feet long Olympic length, with this water I could have seen clearly end to end. My pool is shaded. If it is 100% open air and direct sunlight, I would see more details. Having all white tiles does good for clarity check from surface. Dark blue colored tiles in my friend's pool gives clear water color perception from surface, untill I go in the pool and wear my mask, only then I can check if I am getting his usual minimal 25 meters/82 feet visibility. That is the length of his pool.
I have to admit the recently installed ozone generator does make a difference as far as clarity and "feel" is concerned. I can't prove this scientifically but by being in the water with mask all the time, I know when I do get improved clarity and added "sparkle" to the water.
However I can't say how effective the ozone is in "consuming" chlorine or if it reduces my chlorine consumption.
On 10th August, I shocked the pool to 12PPM FC to clear the 1ppm CC, the day I got the TF test kit. The day I install the ozonator, is also the day i got the TF test kit. So I can't compare previous OTO reading since I realized I can't tell by the OTO yellow color if its is 2ppm or 3ppm. Typically I put 12% bleach a day in quantity for 1PPM increase before I install the ozone. I am at CYA 25PPM.
Since my test on a pail of water somehow showed me that I am reading ozone as CC, I shut down the ozonator untill I can remove CC by super chlorinating.
On 13th Aug 10:00AM, I completed the regeneration of my Zelbrite/Zeolite sand media with 10% salt. Mine is
clinoptitolite type which will catch ammonia. There are 100s types of zeolite for different purposes.
So indirectly I am introducing salt for every ammonia taken off... . Waterbear adviced me to hit 200ppm salt if I want the feel of soft water. I think by 5th regeneration I can get that.
On 14th August 06:45AM I got zero CC and left over of 8PPM FC from the 12PPM shock. I then turn on the ozonator.
On the 15th August I took a dip 5 minutes to test water clarity. It was good, but but not as good as today. FC = 6.5 and CC = 0.2 ( sort of ). This is the day I clean my overflow/balancing tank. There is a lot of black smudge-like stuff on the tiled wall. Oil and whatever gets collected here. Wash entire tank ( its concrete and tiled too ) with soap. Throw water out to drain. Add new city water at 1% of pool water.
On 16th Aug, my wive and kids swam for 2 hours. FC = 7PPM CC = 0
This is when I realized that my water circulation is not that great. I can get 1PPM FC difference by testing different part of the pool. Thank U TF-100 ....
On 17th Aug, 09:30AM. One side of pool with less water flow. FC = 6.5 CC = 0.
The other side of the pool with good water flow. FC = 5.5 CC = 0
On 18th Aug, 08:00AM. Pool side with good waterflow. FC = 5.5 CC = 0
On 19th Aug, 08:05AM. Pool side with good water flow. FC = 4.5 CC = 0
On 20th Aug, 07:45AM. Pool side with good water flow. FC = 3.5 CC = 0
On 21st Aug, 08:30AM. Pool side with good water flow. FC = 3 CC = 0
Today 22 Aug. 08:00AM. Pool side with good water flow. FC = 2.5 CC = 0
I swam 10 minutes today before I do further test.
Today 22 Aug. 14:30PM. Pool side with good water flow. FC = 1.5 CC = 0
Main pump run time since 14th Aug has been reduced to only 13 hours a day and that is 1.1 pool water turn over.
I practically do not use my back up trolley pump since the 14th.
I have read alot on the ozone stuff and I think plumbing plays a very important role for proper operation, aside from how powerful the ozone generator is in terms of gram per hour output against the waterflow GPM at the injected point plus all the "Must Do" for ozone. The longer the ozone bubble stays in water within a plumbing, the more effective it becomes since contact times x concentration of ozone equals kill rate for bacteria/virus. However this is easier said than done. Without a contactor tank, this is close to impossible to be very effective.
I think Dell Ozone and Clearwater has quite a good information on ozone for commercial pools.
Since ozone half life is only 12 minutes at 30* Celsius ( 86 *F ) and longer in cooler water. Those in hotter climates must pay more to get the same result when using ozonator. Sadly I fall in this category. However, ozone killing power is better at 30 *C than at lower temperature.
The way I see it by reading so much on ozone, in a residential pool with small ozone at 2 mg per hour like mine, pool owner must not expect magic out of ozone. Please be aware, some companies will call a 2mg ozonator for a 35K gallon as a decently big residential unit.
To what extend can ozone kill all the baddies thru oxidation and thus help chlorine to do more sanitazion dan less oxidation, giving chlorine longer life in your pool.....its just too expensive and complicated on the supporting equipment required if the performance is expected to be a 5 star rating or kill all baddies. I don't want to go into the details and bored you guys to death.
I think I can summarize this way for ozone.
- The company selling the system must be a real honest professional, honest in terms of explaining the high dollars customers have to spend for the targeted result. If I aim to kill Cyrpto, I will go broke for sure.
- Customers must be willing to accomodate the unique ( & expensive ) technical requirement to have a proper ozonated pool
If one buys an ozonator just because it says this is for a "XXX" gallons pool and believe in that a 100%, I think this is why it is said that ozone is not worth buying from most people's experience. There are so many things that can go wrong on a simple ozone add on in a residential pool. I said wrong..meaning ineffective. The simple analogy is : like buying a 200 gallon aquarium circulation pump for use in a 10,000 gallon pool...well sort of. :P
If you got the $$, going to built a pool from scratch specific to commercial grade ozone standard, follow the German DIN 19643 standard...let me know how it turns out....
So how about my own ozone generator ?
Well I get to play with it.