sick puffer

Ive had 2 figure eight puffers for 2 months now. We did a full clean up and water change a week ago due to an algae build up. we didnt change their filters to save the good bacteria in it. their water has stayed pretty clear ever since but they have been acting strange. They sit at the bottom...

Hi all. I have only just become a member but have been a long time reader. I'm here to get some advice. I have kept fresh water fish for a long time but recently changed to a brackish tank. The reason for change was I feel in love with puffer fish. I have two figure eight puffers 3 months now...