Hi Candy. Thank you so much for being super duper honest. I really appreciate your time and effort in this matter. Honestly I have been looking into the RO/DI system for a while now. I just don't know which one to get. For a few reasons I would actually need it in addition to the 24 gallon all-in-one tank that I have, I currently have a fresh water for a little over a year now with some Oscars, Red Parrot Cichlid, Pleco, Cory and Blue Crawfish and I want them to be healthy. I would also highly consider using it as drinking water. The building I live in is super old, therefore the piping system is bad. Superbad. There are times when they intendant cleans the piping we see, in our end, a lot of yellow or rust coming out and we have to let it run before using it. Even with the use of Britta Filter we still have to boil our drinking water prior to use. I frequently invest in Britta Filter monthly so supplementing it with the RO/DI system would be better for me and more economical. Now in regards to the test kits, a lot of people are saying API are the worst test kits ever, but it is still being sold like ice cream pop world wide. When I compared my api results to 3 fish stores I went through using hanna or better, my results ain't that far off. however I would like to get more accuracy in the future so I am researching more about it and save money in the long run while enjoying what I have. Thank you again for your input Candy I really appreciate you. And for Imforbis, thank you as well for all the recommendations you have given me since I started. My reef tank is 12 weeks old now and as you guys mentioned my tank is doing well. I would like to apologize as well for whining too much and speaking out loud without using my resources. Thank you again for everything. One thing I learned and still learning in this hobby is patience. I need to sit down and just appreciate what I have in my tank. Thank you all so much. Again sorry for being such an inconvenience.