I have a 46g with a clownknive in it. I have probably 2lbs of gravel in a decommisioned tank. Would it hurt anything if I put the gravel in the 46g? I have 1/2inch of gravel in the 46. After a week or so, my ammonia goes up to .25 and I was hoping the extra gravel would host new bb to get rid of that small ammonia spike. Thoughts are welcome.