7 - 1 = ?  
Input the result from the expression
Maximum attempts you can try: 10

air stone, interesting

Subject: air stone, interesting
by kevb123 on 30/3/2015 12:16:12

my air pump broke the other day which ran an air stone in my 400l tank,since it broke my fish has been completely different.
he used to sit in the corner twice a day for a good hour when the pump was working and now flies around and hasn't sat once since it broke.
food for thought....
fish are annoyed by air stones?