Brs reef saver rock

BRS reef saver rock... Do a you'd you guys have it and your thoughts on it... I heard it's very easy to aquascape.... And since it's dry should I put it in a 20 gallon tub to try to build some bacteria before putting it in my display... Or should I buy pukani but I heard it does sometimes have dead sponges on it which would let phosphates and nitrates out into my tank durining the cycling



My tank is standard 55 gallon ..... Probably gonna order 60lbs of rock