Glad that helped...the watery stuff is the #4 and #16 comes in the squeeze tube. I agree the #42 is probably ur best solution, it may be the most expensive tho. If ur super worried about a seam pop, u can tip and pour the inners with #40 or throw in some 1/2" square rod to beef it up (i do this to all my used tanks, but ive never actually owned a new on lol). Using 1/2" from the start for the initial bond will also work alot to ur benifit for longevity of the tank. Most acrylics i find are underbuilt and old so i opt to beef them up.
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