Mini ISTA External Reactor

[blackBRUSHalgae]

For the design itself, it need quite abit of flow to make it spin wildly, too slow and you are waiting for the CO2 to build up, i used the M size before, dump it now, dirt starts to clog in fast and slow down everything.

Exactly what I faced when I had them It was neat unitll the clogging started. and also additional plumbing was a real hassle for me, which also makes the tank looked cluttered.

now back to using ceramic diffusor, only needs a simple bleaching once every 3 months (actually it will still work without it but looks ugly with aglae ^_^)

[blue33]

I'm using NA external reactor, pretty good, easy maintenance and almost 100% dissolve, the CO2 indicator show the change fast also. But that you need at least Eheim 2026 or 2217 to drive it.