Quote:
Originally Posted by Ong88
One of my blocks eroded under the weight of eheim pump that I place on top, imprinted the pump bottom pattern.
Also very easily become sand when I shift them with hands.
Accidentally dropped one when bring out of sump, broke down into sand-like material.
My most disliked filter material due to it's fragility.
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powerheads have vibration, so what u had was like a jack hammer pounding it up.
thats why i was saying cannot have 2 piece rubbing on each other, otherwise sure disintegrate!
