Need some help with browning out sps

[gregzz4]

I'm sure someone with lots more knowledge than me will chime in ...

I wouldn't blame your PO4 at this point
And the only time I've read about SPS problems with phosphates is when they are stripped from the system rapidly

Without knowing what lighting/params etc the LFS had them under/in it's hard to say

I'd say your readings are 'balanced' - you may see some improvement if they were all a touch higher, but don't mess with them yet
Either get your dosing where you want it now, or focus on the lights, but I'd suggest you don't try to do both at the same time

I think you are on the right track concerning the lighting and you should work on getting your params up 'just a bit' and leave the lights down @ 38% until you have the dosing under control
Then, after a couple weeks of watching what is going on, you could consider turning the lights up some more and watch closely what happens