How many bubbles should I adjust for optimal fertilization in a 160 liter tank?
one bubble per 10 liters and minute, or 16 bubbles in this case, are a guideline. However, this is really just a rough value, as the actual requirement depends on the species, number and size of plants as well as on lighting, mineral fertilization, temperature and a few more - therefore it can only be determined individually at the aquarium itself (e.g. with the sera CO2 Test kit).
Dr. Bodo Schnell