Tank is about 4.5 years old, 100g display and about 30g sump, CAD Lights Artisan II.
Sump has biopellets, skimmer, chaeto, 36W cheap Jebao pond UV sterilizer.
PAR: No idea. Never measured. But I can grow SPS on the sandbed. Radion Pro G3 running 100% intensity, 100% all channels at 12pm and only white channel goes down 20% every 2-3h til 11pm, then everything dims down for the night. I've had this program for the past 8 years, never bothered to change it.
Temp: 77-78 in cooler seasons, 79-81 warmer seasons.
Salinity: somewhere around 1.024-1.028
Nitrates: always been 2-5, but I haven't checked it in a year
Phosphate: never had any reading above zero, but I haven't checked it in a year
Calcium 450-500, Alk 8-9, Mg 1500, pH 8-8.2
Only dose calcium, alk, and Mg. Once in a while I'll measure potassium and add as needed.
15g water change every 3-4 weeks.
Got tons of fish, only feed fish flake food, algae sheets, and Hikari mysis.