Thanks guys!
I was thinking of putting 1 via a ladder and the other side going to the output of the canister via ceramic diffuser (inline). So not much pressure issues I hope.
I have a 180 ltr Juwel Rio more-than-moderately heavily planted tank (I intend to plant heavily with time, since here in Swissland, we dont get great plant variety in LFS. So one needs to wait & grab as they come). I have added an extra Eheim Ecco pro to the existing Juwel Internal. my water is HARD (pH abt 8, kH 11, gH is 18) come what may. Tap water is equally hard. So no matter how much CO2 I add (currently its 5 bps), the DC is always blue (sometimes blue-ish), but never green. I have experimented with ladder, diffuser, adding a small pump to increase the flow, changing the relative output directions of 2 filters + 1 pump.. Not much help...
I am not sure if CO2 goes everywhere. (It would have been great to have a water dye/stainer to check this. A drop or two should show the entire water movement inside. If ever I get spare time perhaps I could make one such & sell to all brothers out there
). Tank has abt 25 tetras, 4 corys, 5 plattys, 1 SAE and 3 apple snails. So not a heavy load IMO. I get occasional algae (currently a bit of dust algae on glass, waiting for the 3 week period to wipe it off!). EI dosing is automated.
All in all I am simply not sure if my CO2 is enough, and getting everywhere. Hence this T-joint splitting idea.. If you guys have better options, I am listening