Thanks LB... I appreciate the help...
My res is super duper cool... maybe even too cool... when I fill it fresh, 15 seconds under water and your hand will hurt for over a minute.. it's cold glacier water... really cold... but it does warm up in the room of course...
I use close to 200 gallons of solution in my op, I like big res. because they are more stable, and I do not need to top off... and it stays cooler longer...
I can be gone for a week with no weird fluctuations.. just a steady and slow rise or fall of pH depending on what additive I have in there...
I have never used any pathogen control... I used to use a BLOOM JUICE.. and that was all...
Here recently I have switched to FF... but you say to change it..?
It's no biggie, I can totally put something different in there next week...lol..
But I am curious, you are the first to say something...