Took 24 hours , K1 Max, and it floats 🤦🏽‍♂️ can't even use it in tank, what a bummer. Just ordered some suction cups with screws from Amazon, gonna heat screws up and push them into base of castle, gotta make it work, cool design, added a few holes to allow support to go thru inside and a few holes for bigger fish to roam about inside 👌🏽 suction cups with screws arrived next day, installed heat 5 heat inserts into the base and screwed in suction cups, works perfect 👌🏽