co2 deficiency

Hi there, A few days ago I installed external diffuser JBL Proflora Direct. On the manufacturers website, this product is described in superlatives "Finest atomization of the CO2". OK then I bought it… During installation i found on the inner side of the package a notice, that "it takes...

This thread was started as an offshoot from another thread, see below for details. In a nutshell this thread is about the term deficiency. I hear people using the term all the time for things that I do not personally consider a deficiency. I hear "CO2 Deficiency" multiple times a day and I...