Boston Aqua Farms thick glue
I ordered and tried some today. It wasn’t thick enough for me and I had a hard time with it inside and outside the tank.10 Piece High Strength Super Glue
Amazing deals on this 10 Pack High Strength Super Glue at Harbor Freight. Quality tools & low prices.www.harborfreight.com
super cheap, lots of small tubes, holds well, wish it set up a bit faster but there are ways of making that happen