I'm planning on getting an ADF when my 5.5g betta tank finishes it's cycle. From what I've read it's best to cover the filter intake with some pourous cloth (gonna ask my mom for old pantyhose, lol). Doesn't this reduce the filter's effectiveness by a lot since it would block out large particles in the water? I have an Aquaclear with two sponges and Biomax on top. This should reduce the current too which I wouldn't mind since I'd prefer if it was lower (it's set to the lowest already).