### For US Gallons:

1. **How many tablets do you need to add to obtain X PPM in Y Gallons?**

Enter the desired PPM and the number of gallons, and the calculator will tell you how many tablets to use.

2. **How many PPM will I get if I add X tablets in Y Gallons?**

Enter the number of tablets and the number of gallons, and the calculator will calculate the resulting PPM.

3. **How many Gallons do I need if I have X Tablets and want Y PPM?**

Enter the number of tablets and your desired PPM, and the calculator will show you how many gallons of water you’ll need.

### For Liters:

1. **How many tablets do you need to add to obtain X PPM in Y Liters?**

Enter the desired PPM and the number of liters, and the calculator will tell you how many tablets to use.

2. **How many PPM will I get if I add X tablets in Y Liters?**

Enter the number of tablets and the number of liters, and the calculator will calculate the resulting PPM.

3. **How many liters do I need if I have X Tablets and want Y PPM?**

Enter the number of tablets and your desired PPM, and the calculator will show you how many liters of water you’ll need.