Aqua sobriquet
Member
My Biomaster 350 came with 3 blue coarse sponges and 1 orange fine sponge. I don’t use the orange one as it seemed to be in the wrong place (it’s thinner and intended to go in the top tray) and I use carbon in a bag in there anyway. I taken out one of the blue sponges and use that tray for biomedia. I’ve been wondering though about putting 2 orange sponges in place of one of the blue ones though. Anyone done this? Thinking about how it may effect the flow.