from what I experienced, Salinity had to be mixed for at least an hour before use, it had a cloudiness to it, and if you didnt use it in 24 hours, it would precip out alk and kalk thus causing issues in my system. I also noticed that with Salinity that one bucket would mix out to high alk with ok calc but the next bucket would be opposite or worse, too low. With Microbe-Lift, I could use it after 30 minutes of mixing, and I could let it mix for a week with no issues. Also Microbe-Lift would be the same specs from each bucket. Always had Alk around 10, calc around 450, and magnesium at 1350+. Prices seemed to be about a penny per gallon less than Salinity as well... I swear by Microbe-Lift... Its all I will use and Im glad we are starting to carry it at GW. Right now we carry 140g and 200g buckets. I need to see if they have smaller buckets for people that have nanos since 140g bucket will last them a lifetime.