hey, i have had a 30g that has been set up for about 3 months, i recently moved it into my basement and refilled it and added the chlorine out and some stress coat. my question is, due to the dirt and such left in the gravel from before will my tank cycle faster, i was hoping to put in a 6inch black piranaha next weekend, if it it safe to, at 40$ i dont want it to die, soo waht do you guys think