I recentley got my 75 all set up with some small fish and ALOT of plants and was wondering if it would be worth dosing some CO2 using a simple DIY setup for now and doing it slowly to help and not overdose the tank and what would be some of the best options for that. The plants in there right now are Val, Amazon swords and will be adding some java fern once it arives was also looking into crypts and dwarf hair grass in the future