yea i no wat commerical you talking about,...i thought this sport was called freejumping or something liek that,...i think the has a lot to do with mental strenght,...the body can handle sooo much more than humanly possible
i would say screw the bio balls get enought live rock 40-55 lb i would say live sand is good too,...sump adds more water volume to your tank which makes the water parameters more stable. IMO sumps are a must
i love your pink dot goby and purple firefirst i have the regular ones,..did i mention how much i love the quality of your pics and the coloration of the fish