As this is my first RDWC, I find it's a whole different dynamic. Everything becomes more problematic than with individual bubblers. If something's jacked up, you can't just drain and refill without literally "pumping out" nor can you just disconnect without making a mess. To clean you have to fill, clean, drain, refill, rinse, drain, refill, rinse, drain, refill, rinse, drain, etc...etc...ad nauseum.
The previous fungal issue was in the sprouting, not in the system. I still had not done a full bleach out of the system since converting them to RDWC and that had to be done before transplanting. The peltier is backed with an aluminum water manifold that's connected to the pump. Take a look at the DIY link in my signature and there's an image of the underside of the lid with it attached.
:Sharing One:
Fish