Silicon is just too much trouble... redid this tank with Sanitred only. You can see how it bonds straight to the windows. Sanitred makes a primer specifically for this, its harder to peel off that silicon on acrylic.
Both water and air pumps relocated upstairs... not the ideal configuration for pump efficiency, but the room is silent now at least.
Both water and air pumps relocated upstairs... not the ideal configuration for pump efficiency, but the room is silent now at least.