140 gallon tank just arrived,question i have a fluval 4 in there its pretty strong little canister that you put under water is this filtration strong enough or well i need more power?? i want more current in my tank fluval 4 is pretty good for that but,i just want more current like a strong current thats not to harsh on my fish,also is a 140 gallon ok for a sting ray.and peacock bass?