Chemical Orders: Difference between revisions
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|colspan=5|Pending (Sep 2023) | |||
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Revision as of 13:10, 13 February 2023
Pool chemical orders are tracked on this page. Do not post costs here as they may be considered proprietary to the supplier (not public).
Summary
| Year | Order | Inventory | Usage | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ca(ClO)₂ | HCl | CaCl₂ | NaHCO₃ | (CNOH)₃ | Ca(ClO)₂ | HCl | CaCl₂ | NaHCO₃ | (CNOH)₃ | Ca(ClO)₂ | HCl | CaCl₂ | NaHCO₃ | (CNOH)₃ | |
| 2016 | 50 | 108 | 3 | 2 | 5 | No Data | |||||||||
| 2017 | 40 | 212 | 1 | 7 | 4 | No Data | |||||||||
| 2018 | 63 | 132 | 1 | 3 | 2 | No Data | |||||||||
| 2019 | 72 | 160 | 1 | 2 | 1 | No Data | |||||||||
| 2020 | 30 | 120 | 1 | 1 | 2 | 5 | 130 | 4 | 0 | 3 | No Data | ||||
| 2021 | 60 | 30 | 0 | 11 | TBD | 10 | 15 | 3 | 0 | 0 | 55 | 145 | 1 | 11 | 0 |
| 2022 | 55+10 | 152 | 0 | 8 | 4 | 9 | 32 | 3 | 0 | 0 | 66 | 135 | 0 | 8 | 4 |
| 2023 | 55 | 140 | 0 | 8 | 6 | Pending (Sep 2023) | Pending (Sep 2023) | ||||||||
Key:
- The Order column contains the total number of units ordered for the entire season. If subsequent orders or made (beyond the pre-season order), this should be noted in the notes, below.
- The Inventory column contains the total number of units on-hand at the end of the season.
- The Usage column contains the number of units used during the season (the prior year's inventory plus the order minus the usage).
- Ca(ClO)₂ is Calcium Hypochlorite (Accu-Tab tablets), measured in 50-lb buckets.
- HCl is hydrochloric (muriatic) acid, measured in 1-gallon containers. Typically 4 gallons are packed in a box.
- CaCl₂ is calcium chloride, measured in 50-lb bags.
- NaHCO₃ is sodium bicarbonate, measured in 50-lb bags.
- (CNOH)₃ is cyanuric acid (CYA, stabilizer), measured in 25-lb buckets.
Notes
Pre 2021
Chemical orders were not well tracked. Early season discounts not fully utilized due to repeat orders (sometimes up to 5 orders in a season, also resulting in added delivery charges).
2021
The chemical order was based upon 2016 through 2019 averages. The end result was a planned excess of some chlorine and acid. No additional orders for chlorine and acid were made, so the pre-season discounts were fully utilized.
However, excess purchase of sodium bicarbonate was necessary to keep the pool alkalinity in range (compared to data from 2016-2019). The amount of stabilizer in the pool was also regularly low.
2022 and Later
Starting in 2022, it was determined that there is no need to purchase calcium chloride. The calcium added by the calcium hypochlorite, in addition to the hardness in the city water supply, is more than sufficient to keep the water hardness within desired bounds.
A high burn rate of sanitizer was observed in early 2022. A modest level of stabilizer is deemed necessary in the pool water going forward.