i would get a Herpstat 4 or a combination of Herpstats like a 2 to control the top and a 1 for the bottom. or if u don't want all the bells and whistles, get the EZ2 and EZ1.
Edit:
i agree that it looks like poop Lol. u should have added bark, cork or rocks, etc. to the foam when it was still still soft and wet for texture etc. i also would have went in w/ a knife, scraper and sander to shape and mold the hardened foam before sealant and paint. right now there are just too many nooks and crannies to make it too hard to clean for my liking.