There are three acids listed in Resh's hydroponic book
- Nitric acid
- Sulfuric acid
- Hydrochloric acid
- Phosphoric acid
The trouble will be to find a suitable hose that is acid resistant.
The peristaltic pumps come with silicone tubing and for this the news is not so good. Because of that I have included citric acid in the list.
| Acid 20 °C | PVC | Silicone |
|---|---|---|
| Nitric | up to 50% | Maybe - test it |
| Sulfuric | up to 95% | No |
| Hydrochloric | 50% - concentrated | No |
| Phosphoric | up to 85% | Maybe - test it |
| Citric | 10% - Saturated | Excellent |
It seems a citric acid solution is preferable for my uses.
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