well maybe its because i have a small aquarium
even though a small portion of the surface is hit, it will be big in percentage
i tried the flow to be the lowest and my riccias bubble
but the filtration is not sufficient
i changed my DYMAX because the co2 was leaking
co2 not coming out from the bottom
now all my plants are bubbling
but the EHEIM internal filter is taking up too much space
i support EHEIM because it provides us with 3 years warranty
so its quite worth it ler
i just sold off my eheim ecco 2236(regretted)
because i thought its not suitable for my small aquarium
now i will either change to a bigger aquarium
or get an EHEIM classic 2213 filter
on a tight budget
already spent money on the internal filter