Hey chris welcome back!
The gushing could be caused by air bubbles getting into the intake. Make sure you dont have any airstones near it or have any waterflow directing the bubbles to to the intake. Thats usually the cause of the gushing noise.
The gushing could be caused by air bubbles getting into the intake. Make sure you dont have any airstones near it or have any waterflow directing the bubbles to to the intake. Thats usually the cause of the gushing noise.