i just went and bought a used 55 gallon tank stand a the guy had a sponge filters so i picked one up too since i want to have one with my canister filter when i get around to setting up my tank. i have some driftwood soaking in water with some prime in it and since the sponge was wet wen he gave it to me i decided to soak it too. is that okay? or should the sponge be fine without a pre soak?