Pejc, I just realized you are doing DIY co2 on a 70 gallon!!! Could you explain your setup and routine? What's your photo period and why do you have two actinics?
I have external filter Atman EF-2 (450l/h) ang 2 heaters 200w each. I use 2 bottles 2l each and I change them every 2-3 weeks![]()
Thanks, the filter looks to be an Eheim proII knock off, how is it working for you?
do you have a drop checker for your Co2?? Just wondering how much ppm you are getting...