I would put some LR rubble in it and some cheato. the LR will give the pods a safe place to live and populate and the cheato is a great nutrient export.
This was the response he originally received. I only wanted to add that the lack of QTing will most certainly spell disaster and always seems to do so after lots of time and money has been invested. He can spend thousands on a filtration system and have an abundance of life in his fuge, but by adding one fish without QTing he can wipe it all out -as he's done already. Ich is however completely unavoidable if you have the information - which I was trying to share.