my wife got me a penguin 200 bio-wheel for my 28gal for x-mas. i know she got it on sale and we have a rather tight budget. i have a diy co2 setup and 65w light. i am currently using a whisper 20-40 with flow turned low as i am concerned about suface agition. if this penguin filter is a bad idea should i exchange it or is it ok? store won't refund and i think she paid like 28 bucks for it.