Yo YO! I purchased a 29G tank setup from a buddy of mine and he had an UNUSED API master SALTWATER test kit. I purchased the API FRESHWATER test kit and wondered if there is just a difference in time for the various tests or if the actual reagents in the bottles are indeed different? I am asking because I want to know if I can use the reagents from SALTWATER test kit when my FRESHWATER reagents are empty. THANKS FOR THE INFO!*thumbsups