NIce lung, a few concerns though:
1- a sandy substrate is more natural- they like to burrow
2- cockles are not a natural food source and are apt to cut the interior of the mouth or other membranes along the gastrointestinal tract
3- that tube in your tank looks like metal- if so, it will ionize and pose a health hazard
1- a sandy substrate is more natural- they like to burrow
2- cockles are not a natural food source and are apt to cut the interior of the mouth or other membranes along the gastrointestinal tract
3- that tube in your tank looks like metal- if so, it will ionize and pose a health hazard