I have a Etss 500 series and I don't know why it's not bubbling like it should. Water is drain from the top to the bottom of the cylinder but when it come back up it's not making much bubbles and the water line is under the middle bracket piece. Can some on help please... thank you! Feel free to call me because this is really setting me back and I need it done like Now. (206)327-9104 I have a birthday party today (mines ) and I want people to see a really nice tank.
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