| | Re: New Tank Setup Guide - Parts 1 and 2
on the contrary CO2 injection gets cheaper over time as you only have to buy the equipment once and take care of it. depending on how big your tank is decides how big you want you cylinder to be. i use a 5lb on my 55gal (recently moved to 75) but it lasted me 6 months and only costs 10-11 dollars to refill at any welding supply shop. excel gets expensive especially if your dosing in larger tanks. as it goes very fast. but also light is very important. if you keep it in the proper light range you should be able to maintain healthy plant growth without CO2. the plants just wont grow as fast but with CO2 they will explode in growth.