Hi i have a 5 year old red eared slider hes in a 60 gallon by himself for the last 2 years hes only about5-6 inches long i have beach rocks that are about the size of a toonie each or well if ur not canadian well say like an inch and a half big each so he cannot eat em but lately ive gotten a girlfriend (im 14) and i dotn have tiem to clean it everyweek and iw as wondering maybe if i took out the rocks maybe the filter would get more dirt also i liekt he look of a tankw ith no rocks just the floating dock but seeing how hes used to the rocks will thsi cause him any stress, when i first got him i read all bout how soemtimes it sbetetr with nothign im just worried hes too used to it.?