Marineland Penguin 150 Question
Im using a Penguin 150 in my freshwater tank. It has 2 slots for the filter pads, but only came with one. I put the second one in thinking all it could do was help, but I noticed the bio wheel moves a lot slower with the second pad in. Any suggestions if I should leave the second filter in or take it out? I added it the day after i started cycling my tank and its been 3 weeks so its been cycling with it in.