Hey guys - i just started my first tank about 2 weeks ago, and everything is going well other than when i was cleaning out my tunze powerhead, a very tiny stainless steel washer that sits behind the impeller fell into the sand bed and is no where to be found. The washer is very thin and very small, much smaller than a penny. I have tried magnets, and fished around for hours but cannot find the darn thing. This is a 29g tank, and this is now freakin me out. How bad is this ?