Quote Originally Posted by froggyhobby View Post
You may want drainage holes on you planters through your foam. Otherwise you will get water retention and flood your plants and root rot. (Potentially)

Also Foam has been known to separate itself from glass after 6 months or more and it could cause your other half of your tank to flood out where you put soil.

Also, RETFs require fresh water daily. Not sure if there is any long term effects to a RETF which has water that remains in the tank and runs through open celled foam over time
I am by no means an expert but I have done a little research.
Good shout on the drainage holes I will definitely look into that.
As for the foam yes you are right but this is one of the reasons for adding the silicone to the glass prior to Foaming (that and how unsightly it is through the glass)
The reason for the fresh water is to stop bacteria build up in the small pools normally provided to RETF's, there will be approximately 1 gallon of water in this system and I plan on doing regular water changes (how regular they need to be I am not sure but will be at least 10% a week). Also the foam is being well sealed so that any potential toxic leak from foam will not happen.

Hopefully these steps prevent any of the issues you have highlighted, thanks for the feedback though it is always appreciated.