TankSafe Test Strips 5 pack How do you know TankSafeTM is working? Pour the required amount of TankSafeTM in your rainwater tank. Test 24 hours after dosing with TankSafeTM to ensure appropriate dosing has taken place. To check levels of protection after dosing, immerse a TankSafeTM test strip in the treated water for 1 sec and let the strip sit for 15 sec, then compare to the colour chart indicator. To ensure continuous safety, test a minimum of every 2-3 weeks or after significant rainfall.
