Well, the trichlor did an unexpected effect on the pool because I didn't take the right decisions plus have very little experience with trichlor..
First added in the morning 2 kilos of trichlor a couple of days ago. Tested the water in the afternoon that same day and FC and CYA we not giving any readings. FC was supposed to go up to 35 and CYA to 30's as I commented before.
So, we added one kilo more, total 3 kilos (2 kilos in the morning, 1 kilo in the late afternoon, Friday 18th).
On Saturday morning these were the results:
FC: 41
CC: 0
pH: 8.0
TA: 180 (here something strange happened. The solution didn't turn red/pink, instead it turned light yellow? :?: )
CH: 230 (here also when the solution changed into "blue" it was a very light blue, almost white)
TA and CH were tested twice...
CYA: 70
Temp: 22ºC
Salt: 810
- Added some MA 33% to lower the pH and added some salt (have to buy more later; ran out already).
- Also was trying to check the cell, but as the FC was too high, I had to abort the cell inspection. I just unscrewed it and the screwed it back to where it was (vertically).
- As we couldn't get Sodium Thiosulfate to lower quickly the chlorine level, the only thing I thought we could do, was to empty almost 1/3 of the pool so I would have enough time to refill for Sunday (today) morning and the guests could use the pool.
- After doing this, I just came back and these are the results:
FC: 35.5 (before 41)
CC: 0
pH: 7.2 (before 8.0)
TA: 200 and again it was yellow at the end..
is this normal? (before 180, the city water adds TA, at the beginning of this thread was 780!)
CH: 200 (before 230, but at the begining of this thread it was 980!)
CYA: 50 (before 70)
Temp: 22ºC
Salt: 1,230 (before 810)
So empyting the water less than 1/3 aprox. this time didn't help much. Actually some trichlor powder was still on the bottom of the pool because on Friday night, there was a power shortage and the time on the computer got wrong (the program remained ok) so the pump ran only like 3 hours instead of 8.
So after refilling and leaving the pump all night until today those were the levels. Meanwhile I was there I put the hose in the pool to fill in some city water "trying" to dilute the FC a little.
At least the CYA wen't down from 70 to 50 so that should a little to lower the FC with time. Also set up the chlorinator to 10%, but remeber that we have a problem with this cell so I don't know if it will do anything at all.
Ann by the way, today that I went to check on everything, this time the chlorinator Aquarite was showing "No Flow" (steady light, not flashing), and there it says that has to do with some Delay on the Flow, but I don't understand why it shows that?
Before and after we drained almost 90% of the pool, the chlorinator diplayed No Flow for some minutes and then it didn't show that anymore. Also, as before, after refilling the pool it showed again "Inspect Cell" and diplayed a wrong reading on the salt of 1,400 (salt strip was around 9,000 and after draining was 810, but the chlorinator always marked 1,400).
Now the chlorinator marks Salt = 0 and there are no other readings because I think it has to do with the "No Flow" warning. Didn't have the time to read on the manual (yes yes yes I know
but will read asap..)
This happened after I "re-installed the cell" (I didn't take out the metal parts nor did any cleaning.
Going back to reducing the FC I guess now I just have to try to find some Sodium Thiosulfate right? I was trying to find another name for it and found "Salicilic Acid" but I am not sure it is the same as the S. Th.
Any ides on how to lower the FC in this pool? or where do you usually find the sodium thiosulfate or under what names? If I get some, how much should I get and how much should I add?
EDIT: just found that the Sodium Thiosulfate is also called: ANTICHLOR, SODOTHIOL, SULFOTHIORINE, AMETOX and that it should be used : 1 drop for each liter of water. Do you know if this is correct?
Well, sorry for the long post... jjust noticed it got a lot of words... :?
Thanks for any help.. and spanking for me not doing things correctly, but well.. still in the learning curve...
NEW EDIT: just found very little antichlor.. those used for home acquariums... instructions say 1 drop for every 2 liters. Have two kind of bottles (took all available from the grocery store):
- 6 bottles with 40 ml (1.5 oz aprox) (drop type)
- 2 bottles with 45 ml (2 oz) (drop type)
- Total of 230 ml or 8 oz
Does anyone has a rough idea on how many drops you could get from each bottle?
200 drops per bottle (1.5 oz?) maybe?
Anyways I think is to little to lower the FC ?
Suppose 200 drops per bottle x 8 bottles = 1,600 drops x 2 (ratio 1:2) = 3,200 liters will be affected to lower the FC out of a total fo 51,000 lts (SG pool on signature). Unfortunately they won't re-stock with those antichlor until the end of the next week. but hopefully it will lower a little the FC (3,200 out of 51,000 = 6.3%, so FC would be down 6.3% ? is this a logical way of estimating this? Current FC is 35.5 minus 6.3% gives us a final FC of 33? Doesn't sound that good...