Interesting use of the Tygon tube. I have 2 tanks down aft under the cockpit 500GPH. Sounds the perfect visual device. Many years ago I found some 3/8" red floating balls I dropped one in each tube in a previous boat too enable easier seeing of the depth of fuel. For the life of me I cannot seem to find any info on them. Has any one any idea where I could get them or similar?
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