Hi, ive got a 55gal, i want a wet dry filter for it LOL
. ive been running it with 2 HOB
filters, one a kinda crappy whisper biobag, and a good Aquaclear bio filter. everythings fine, and my water levels are good, its been 3 months now, and ive been looking to add some cooler fish to my tank i think the benefits of having a refugium are worth the trouble of building one, ive got a few questions.
How EXACTLY does it work, i dont really get it. and are there any easy to understand plans i can use to build one, becuase im sure as heck not paynig 279.99 for a plastic box.