Do you have access to clear corn syrup?? You mix I cup white sugar, 1/2 cup clear corn syrup. Heat in a large glass measuring cup in the micro till combined. A minute or two. Stir with a metal spatula to make sure sugar & corn syrup are mixed. Pop back into micro for 30 seconds or so. Use a heat proof glass bowl, the shape you want for the fish bowl, to pour the mixture into. Make absolutely sure the bowl you use is heat proof, or it will crack, or worse, shatter from the heat of this mixture. Be careful, the mixture will be VERY HOT!!!! Pour in quickly, but slowly as to not create too many air bubbles and leave to set. Will become hard in about 5-10 min.
Hope this helps and you can understand my instructions.
Creativity is God's gift to us. Using our creativity is our gift back to God. Clarky's Cakes 😎