I think they are saying it lasts longer in as much as you use less and it lastes longer before you have to buy more. I don't think he ment lastes longer in the tank. At least that's the way I understood it.
Aquanero answered this for you. Sorry if my post was confusing. Safe is a more concentrated form of Prime, you use less of it at every water change. You won't run out of it as quickly as you will Prime.How is the powder form used? Lasts longer? Why would you want it to last longer if you neutralize the chlorine with the liquid prime it is neutralized permanently no? Just curious as I was just looking into other products that may be cheaper. Think I will stick with prime. I dose full tank when doing 50% water changes.
It does neutralize ammonia which is good in the water being freshly added to the tank but if the extra remains in the tank it can continue to neutralize ammonia and starve your bacteria.
The smell of Sulfer or rotten eggs come from sodium thiosulphate that what you smell.
I've decided I'm not using Prime anymore once I run out of what I have. Going for Safe. I'm tired of spilling the liquid stuff on my fingers and clothes.
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