I got a tank out of drydock at my parents house, 15 gall or so 10x20. I went and bought new rock, a top filter ( the salesman tal;ked me out of running that AND a bottom filter, said i didnt need it. recommended a "gravel vacuum", or a tube that sucks the crap out of the gravel when you replace the water, still not sure about that decision) took it all home and hooked it up. We have well water, heavy in rust it seems, because the water is yellow. I am going to take the water out, but my wife says i can buy clarifier to clear up the water. what would you guys recommend!? Thank you in advance for all of your help!