Is an Iwaki 70 to big for a 180??

[buddah001]

I got a great deal on a used Iwaki70 for 20 bucks. Put 2 new bearings in it and the thing runs like a champ. I have it plumbed so it feeds 2 1"sea swirls they are going to be y'ed in the tank to 2 3/4" lok lines each. The pump runs very quiet and I put a true union ball valve on the intake so I can throtlle it back if needed but we'll see. This is on a 180g. Thanks!