Ted
Why are u dosing 50ml now??
Post #29 u dosed 25ml
Your chasing #'s again!!
Do ur 25ml a day, ride that out for a week or two if u can.
U found a pretty good starting number, work with that and let your tank slowly adjust and fall into what it likes to run at.
Not sure why u are trying to achieve 8 or 8.5, 7 to 8 is fine, your in the ball park now.
Heck, my alk has been running 6.4 area for two months now, yes a little low & uncharted area for me as well!
But I am not pulling my calculator out and dosing what it tells me to get back to my normal 6.9 to 7.3.
My tank is different (remember), I dose around 200ml each alk & Ca per 24hr.
U may find that 25ml a day gets u 7.5 consistent enough, but only adjust it by 10ml up or down (once) then test it that way for a week or so.
So if u need more boosting take ur 25ml a day to 35ml and then test for a week or two.