is there a way to measure the co2 in my aquarium water
i have a 55 gallon long ...no plants or water..or anythign yet..im trying to figure out everythign first. ists going to be high light,co2 and fertz....this is my first planted tank btw..i was wondering if there is a way to measure the co2 because i want it to be as high as it can be without killing my fish or stressing them. any info at all is welcome..thanks. oh..how much can i expect to pay for a co2 system?