I started using red sea no3 po4 X about a month ago this stuff is amazing! my nitrates are down from 20/30 to .5 I don't have a phosphate test but it must be down because my byropsis and geladium (sp?) has stopped growing & is getting thin & brown tips & hermits & snails are snacking on both (a first!) tank is so much brighter, corals are finally getting color that is not swamp mud brown. I've been dosing 1 tsp kalk to 1 gal of top off water everyday in the last week I have had to go to 2 tsp of kalk in order to keep calc. alk & ph up so corals are up to something ha ha so this all got me to looking at their other products I am using red sea coral pro salt but only change out maybe a few gallons a month I was wondering do I really need all the coral color products (and all the tests for each) or should I just get better at changing out water every week ? in other words does the salt have what the suppliments have or are they "better" ? I would also like to eliminate the bio pellet reactor it has been running for over a year & has not come close to what the nop3 po4x has done but not sure if this product has just made it work properly & should be kept? thoughts on this? would like to hear from those using any red sea product they think has made a change in their tank