i've been looking at ways to disperse the c02 to my tank - i'm just using the stock standard DIY set up and in terms of how to disperse it in the tank, i've got a few options i wanted some advice on! (tank is 30 litres, or 8 gallons).
option 1 - simple diffuser i bought from ebay a while back
CO2 Diffuser suction Aquarium Aquatic Live Fish Tank | eBay
option 2 - using my current internal filter's outlet and tinkering it to create a reactor - i've tried to attach the picture of my idea (nothing that special).
option 3 - a combination?
what's the best do you think?