has anyone here ever seen or built a canopy for a 30 gal hex tank? i picked up a 30gal oceanic tank at petco when they were $1 per gal. the stand however was $150.00, so i built my own, not hex but square. it came with a glass cover and light, only 15 watts. i figure that with a full canopy i can add more wattage. any thoughts or ideas?