i just got abotu 20 used tanks, all complete with HOB filters 
unfortunately, the person who last kept them just let them run while he performed no tank maintanance and the water level dropped, and pretty much burned them all out
i've fixed a few of them bu just refilling them and plugging in, but the rest make either an awful screeching sound or just won't work!
what can i do to fix them
i think most of them are whispers.
unfortunately, the person who last kept them just let them run while he performed no tank maintanance and the water level dropped, and pretty much burned them all out
i've fixed a few of them bu just refilling them and plugging in, but the rest make either an awful screeching sound or just won't work!
what can i do to fix them
i think most of them are whispers.