Thanks for doing out the math, it makes sense to me. I've noticed nothing but positive results with all my corals in the system in the short time I've been dosing. I think if I can get to 4 or 5 ppm it will be perfect.I don't run any gfo or carbon and my po4 is like .025 , I turned my skimmer down to run at night only. 350 gallons is a lot. Well here is what I got. I run 2 tbsp per liter of RO and I usually dose 10 ml every 3-4 days to achieve 20-30 ppm. If you used that same formula on your tank.
.5(KNO3) x 350gallons=175 mL of KNO3
However you said you doubled it
So I just divided 175 by 2 and you get roughly 87-88mL of KNO3 at 4 tbspn per 1 Liter RO
NOTE: I have a 20 gallon nano, with 20 or so frags in it. This is what my system utilizes.
I technically dose .5 ml per gallon in my tank, now check my math but that would mean you need to dose 175 ml to achieve what I do.(please don't take my word and dose that. Please check my math)
Are you skimming?
Seems about right if you are only able to achieve .75 ppm dosing 0.12ml per gallon.
I would mix a new batch at 2 tbspn per Liter and try dosing 175 ml. NOTICE I said what " I " would do, you do whatever you please and just a disclaimer but I am no way shape or form telling you what YOU should do and I'm not responsible for any loss of coral. Ugh now that's out of the way. If you have an sps dominated tank that benefit from nutrients or higher than normal KNO3 seems like the worse that happens is you get to high and have to do a water change. Skim hard and run carbon.
Go easy and work however your comfortable. Your corals are hungry! Feed them! Haha good luck bud sorry for the rant. I hope it makes sense.
No3 used to run around 4 or 5 and my system did very well then, not really sure why its gotten so low but I should have been testing I suppose.
Tanks it mixed, lots of acros monti stylo bn zoas lithos leptos psammi's goni's chalices bounces blastos pectinia etc... I have a bad complex where I have to have everything.