how to quiet a noisy air pump
ok so i bought a marina 300 air pump for my 55 gallon tank. when it first starts up its relatively quiet, but after maybe 30 seconds it starts making a sort of grinding noise (im not sure how to describe the noise).
ive tried putting it onto of a thick blanket to see if that helps, but its still really noisy. i have a smaller air pump (same make) in my bedroom and that doesnt make a sound.
its a new air pump so i cant understand why its so noisy. i need some solutions on how to make it quiet. id rather not buy another one as ive only had this one for about a week