Ok, so i am new to the saltwater scene and i have no clue what to test water for or what to add to the water. can anyone suggest any website or help give me a crash course in chemistry. I plan on keeping a reef tank with assorted corals and fish (undecided as to exactly what just yet). I would just like some input on where to go. suggestions for a test kit? so far from what i have read calcium, ph, iodine,strontium, are among the top to keep an eye on?? i have read about kalkwasser dosing, and some two part additives...as a newbie i am lost. from my understanding you actually replenish most of the trace elements if you do periodic water changes and use a good salt mix??? i think it would be absurd to order a five gallon bucket of salt offline and i have no sw lfs, limiting me to petsmart..they have instant ocean and red sea coral pro salt. are these good salts? which should i choose?