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We realize that our world of rust stains and irrigation systems is foreign to many of our web site visitors. We have tried to achieve a balance in our site between giving the site visitor enough information to make judgements and form conclusions but not so much as to overwhelm the visitor.
If you have observations to make on the site, please use the contact us page. We won't flinch from criticism and are glad to have a chance to improve.
We do welcome telephone inquiries during our workday hours (Eastern Time Zone, please).
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Dosage Calculator
Mixing Charts
Use these mixing charts to determine how much Rid O'Rust Formula to mix with water in your feed tank. Please contact us if you have any questions.
As an alternative, the Online Dosage Calculator may be used to calculate dosage.
Important: The charts are based on (A) a 30 gallon feed tank, and (B) a 25 gallon per minute flow rate for the irrigation system. If your particular application has a different tank size or flow rate, the dosage figure must be adjusted. If you do not know your sprinkler system flow rate, you can approximate it by determining the number of sprinkler heads on your largest zone and multiplying by 3 ( Number of heads x an average of 3.0 gpm = Total gpm). Please note that Formula 500 is presented in quarts. All other Formulas are presented in gallons.
| Quarts of Formula 500 to be Added to Feed Tank |
| PPM of Iron |
Feed Rate of Feeder System |
| |
5 gal. per day
(.21 gal per hour) |
10 gal. per day
(.42 gal. per hour) |
24 gal. per day
(one gal. per hour) |
1
2
3
4
5
6
7
8
9
10
|
2.0
3.5
5.25
7.25
9.0
10.75
12.50
14.25
16.50
18.0 |
1.0
1.75
2.75
3.75
4.5
5.5
6.25
7.25
8.25
9.0
|
.5
.75
1.25
1.5
2.0
2.25
2.75
3.0
3.5
4.0
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Gallons of Formula 300, Formula 1000
and Formula 2000 to be Added to Feed Tank |
| PPM of Iron |
Feed Rate of Feeder System |
| |
5 gal. per day
(.21 gal per hour) |
10 gal. per day
(.42 gal. per hour) |
24 gal. per day
(one gal. per hour) |
1
2
3
4
5
6
7
8
9
10
|
2.0
3.5
5.25
7.25
9.0
10.75
12.50
14.25
16.50
18.0 |
1.0
1.75
2.75
3.75
4.5
5.5
6.25
7.25
8.25
9.0
|
.5
.75
1.25
1.5
2.0
2.25
2.75
3.0
3.5
4.0
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Charts based on 25 gallon per minute flow rate for irrigation system. Adjust proportionately if your rate is different. Cut dosage by 1/2 if using a 15 gallon tank.
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