substrate and fish list question

[nykid4202002]

i have a 20 gallon fowlr tank curently i only have 2 chromimus and 5 blue legged hermit crabs my ? is i have crushed coral as my substrate can a gobbie be put in this tank with out hurting it self and ne ideas on other fish for this tank...... thanks

 

[dogstar]

Did you have any particular goby in mind ?
Theres over 2000 different ones...many will do just fine in a 20 gl. with CC substrate and those tank mates given the tank is well maintained.