Hello all,
I've been reading up on chlorine and bather load, and on this forum I see a recurring statement, with an reference by the TFP Expert chem geek:
"A rough rule-of-thumb is that the chlorine demand from bather load in spas is around 7 grams of chlorine per person-hour."
I've searched this forum, but can't find the original post where the 4 grams for pools and 7 grams for spas comes from.
My question is this: Where was this rule of thumb started, or how is it derived?
---
This is my situation:
I have a new cedar hot-tub with no liner, and I'm advised to keep the Free Chlorine at 1-2 ppm, and never above 3 ppm until the tannins leach out. Then I can use the Cu-Zn-Ag ionizer for water purification to reduce the chlorine usage. But for now, I'm still seeing tannins in the water, and I'd like to use it now.
Given that it's only 440 gallons, I'm more limited than people with standard spas and hot-tubs in the amount of Chlorine I can add. If I keep a level above 3 ppm, I risk creating wood-pulp.
Translating the 5 fluid ounces of 6% Bleach per person-hour (or really the 3.5 tsp DiChlor 56%) to a 440 gallon volume, that comes out to 5.8 ppm per person hour.
My questions are:
Does that mean I should put in enough to add 2.9 ppm before bathing and another 2.9 after... and hope the period I have FC above 3 ppm is short?
and
Shouldn't I stay below 5 ppm anyway?
--
I love the new Cedar Tub and I want to use it (safely) without damaging it.
Thanks in advance.
I've been reading up on chlorine and bather load, and on this forum I see a recurring statement, with an reference by the TFP Expert chem geek:
"A rough rule-of-thumb is that the chlorine demand from bather load in spas is around 7 grams of chlorine per person-hour."
I've searched this forum, but can't find the original post where the 4 grams for pools and 7 grams for spas comes from.
My question is this: Where was this rule of thumb started, or how is it derived?
---
This is my situation:
I have a new cedar hot-tub with no liner, and I'm advised to keep the Free Chlorine at 1-2 ppm, and never above 3 ppm until the tannins leach out. Then I can use the Cu-Zn-Ag ionizer for water purification to reduce the chlorine usage. But for now, I'm still seeing tannins in the water, and I'd like to use it now.
Given that it's only 440 gallons, I'm more limited than people with standard spas and hot-tubs in the amount of Chlorine I can add. If I keep a level above 3 ppm, I risk creating wood-pulp.
Translating the 5 fluid ounces of 6% Bleach per person-hour (or really the 3.5 tsp DiChlor 56%) to a 440 gallon volume, that comes out to 5.8 ppm per person hour.
My questions are:
Does that mean I should put in enough to add 2.9 ppm before bathing and another 2.9 after... and hope the period I have FC above 3 ppm is short?
and
Shouldn't I stay below 5 ppm anyway?
--
I love the new Cedar Tub and I want to use it (safely) without damaging it.
Thanks in advance.