Terrarium Lighting Overkill: Marine Tank Lights Cook Carnivorous Plants

Terrarium Lighting Overkill: Marine Tank Lights Cook Carnivorous Plants

Gilbert converts a marine aquarium (250W metal halide + 100W HPS) to a bog terrarium with goldfish. Lights 31" away, moving to 3" above. Incandescent initially burned plants. Fan blows on fixtures. New growth appears but leaves brown.

Diagnosis: Incandescent Burn + HID Overkill

• Incandescent = hot, wrong spectrum → burned leaves.
• Marine lights = tropical sun intensity + heat → terrible for small enclosure.
• 100% humidity = mold magnet. Most CPs don't need high humidity.

Better Approach: Open Shelf + HID

• Use one HID on a shelf, suspended ~12" above plants in trays.
• Adjust height for heat; open air prevents cooking.
• Works for tropical sundews, Mexican pings, intermediate/highland Nepenthes, Cephalotus.

Volume #2 DVD covers artificial lighting.

Key Takeaway

Marine tank lights are too intense/hot for CP terrariums. Ditch the enclosure; use open shelves with HID or fluorescent lights for better growth and fewer problems.