Just curious, when you mention "tubs", are you referring to the Tropica 1-2-Grow HC tubs, the small ones? Reason why i ask is because the amount of HC planted still seems quite little (considering the size of the tank).
The more common method most people do is to just grab all the larger mats and cartons of HC from various LFS (thats why HC always first to be sold out) and cover as much of the substrate as possible, helps to beef up plant density at the start... and hopefully improve the chances for the carpet to form up before algae take over.
That being said, you can definitely still grow a HC carpet with less initial planting mass, just that have to wait longer for it to grow in and have to try to keep everything as balanced as possible in the meantime.
Light green (going towards yellow) means the Co2 levels are already starting to reach pass the safety levels for livestock (> 40ppm)... a nice solid green color is what you are looking to maintain during the active photoperiod. But since you don't have any livestock in the tank at the moment anyways, its okay to maintain higher levels of Co2.
Are the hoses your filter uses the 25/34mm ones? If so, then you're right, the choices for inline reactors might be limited. I guess probably have to DIY something.
Bookmarks