Prime, 50 mL / 1.7 fl. oz.

Anyone in the hobby for quite sometime has used Prime or atleast heard of it. If you really care about the life of your fish and want to REALLY treat tap water, look no further. It does what it says, you can even check water parameters after using this. It also detoxifies harmful chemical compounds and can be used to treat water in the instance of an ammonia spike. It has no expiry date which means it can last you forever, it's highly concentrated so you really need very little per gallon of water. Competing products from API or Tetra are nowhere near its class. It all comes down to whether you want your fish to survive or you want them to thrive. Do them a favour and get this, buy a larger quantity so you get your money's worth and can use it for a very long time.

This is the best one as of now i purchased

Excellent product

My ammonia level is below Alert level. I think it is working.