I'm just about to assemble everything! I need to double-check regarding silicone.. the package says it's cured in 24 hours. I used silicone to attach a foam-based platform to the top of a resin tree base thing, and also to repair the nipple on a water fountain unit. Is it safe to assemble these into the water portion of the tank after the 24 hours wait time? This has been a bigger undertaking than I expected, Chester has his own Taj Mahal no doubt!