i have a fluval profile with is about 300ltrs and i came with a 405 filter at the mo i only have young mbuna in there but as they grow i think the 405 wont cope . was just wondering what filter i could replace with as tank has the pipe that come in through to bottom i still want to use them, how about a eheim pro 3 2075 or is that still no good for messy malawis.