Recent content by zstew

Thanks Mike13. I'm thinking I'll start with citric acid, I figure half or a full kg. Then monitor with test strips. Is there a convincing reason to use DS40 over citric acid?

Agile, It sounds like there's no danger in overdosing the system on citric acid. I've got about 2800sq-ft (260sq-meters) of space. 15 radiators, and a cast iron boiler that's making kettling/pinging noises. It did have significant water loss for a good while (many months, maybe years) so I...