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Just the opposite Kalkwasser raises pH - which is a good thing. You should NOT raise your pH too quickly. Rememberthe pH scale is logrithmic. This means (for example) a 0.1 point increase in pH is a 10 fold increase in ions. 7.5 to 8.3 sounds like too fast a raise. Kalkwasser and ALK...

I siphoned out hundreds, maybe thousands, of flatworms. I did it several times. Then I dosed with FWExit. I used the recommended dosage (5 drops per 4 liters - and then after 45 minutes since there were some still living another 2.5 drops per 4 liters). It didn't kill them, so I was going to...