Both of you are correct BUT what it costs a person to purchase a large pack of bioptim, the carbon source which I paid $60, I have a full 100% self sustaining dosing system.
So at the end of the day you pay around $120 for a large pack of biodigest and bioptim which is somewhere around 6 months worth of carbon source and almost a year of bacertia source, both depending on your system.
I have a 100g total system volume and it costs me $27 to run my system for 5 months. And in the end it cost me less then what it costs for 1 box of optium/digest to set up my system and touch once every 5 months... Once every 5 months is alot less then once a week... sounds like an alot easy method to me
