Please note that the PICTURE UPLOAD function is not working. The iBoats Forum Moderators are working with the system administration folks at the parent company to get the issue resolved. This happened about a year ago and here we are again. In the meantime you can post photos as links to a picture hosting site of your choice. We are sorry about the inconvenience and will advise when the issue is resolved. Thank you for your patience.
They make shatter resistant bulbs. I know people who use thick bulbs to keep crawl spaces warm up north, pipes from freezing and underground water tanks...
Look for thick glass bulbs...
20 gals? Holy moly. I know it doesnt answer your color question, but in the rv world we drain the tank and open the bypass valve. If you don't have it can you install one for future use?