That doesn't have anything to do with anything. Zero is Zero. Salifert is and has been the best test kits for decades. Furthermore all the same stuff is available it just gets rehashed to new reefers. That BRS filter sock thing they can't shut up about is circa 1980's, it's just come full circle. Bacteria has been in bottles for at least 20 years now. Many people argue the best skimmers were invented in europe in the late 90s, they still walk all over what we use today -- the cost of electricity is just staggering in america. To this day there's 30 year old life-reef skimmers that kick the crap out of everything out there.
So TLDR; I disagree.
And I've had this conversation too many times -- take it or leave it, I will not respond
Color and growth. My corals were paling out and I kept dosing nitrates and it wouldn't help. Got my no3 just shy of 50 and it still wasn't helping, so I did what everyone said was the cardinal sin. I dosed po4. Everyone said everything would die. My water would catch on fire. A dark door to the 9th layer of hell would open in the heart of every acro.
They were all wrong.
SPS like po4. Too many people have colorless pale corals. po4 is almost always the answer. Just see how many beige brown Fox Flames are out there. People question if it can even be red -- dose some po4 and watch it turn red.