Plant Engineering Plant Engineering provides authoritative coverage of the use of technologies and best practices to improve productivity in the design, planning, installing and maintaining of plant systems, facilities and equipment. Discovering Philodendron Ring of Fire Variegated: 6 Key Points Hardy Ice Plant Variegated Philodendron spiritus sancti: the $25,000 Plant MonsteraX Riparium in a 10 gallon fish tank! We kept fish in the aquarium but then converted it into a paludarium riparium! It worked well with air plants, orchids, pothos, philodendron, and ivy!