Yes they do float if not anchored correctly. Solution: dry off the base of the bulb, use aquarium safe glue and glue it to a rock, once placed in the tank, cover the rock/roots with substrate until about a third of the bulb is buried. (I simply bought a bag of black pebbles from Loweメs, make sure they are untreated/unpolished, you could also use driftwood etc) you can glue about 5 or 6 plants per rock then youメre also able to try different locations throughout your tank easily! I bought these for my 125 gal with 8ヤ comet goldfish. The leaves of this plant are strong yet flexible. My fish will break the stems of Amazon swords, but so far they havenメt been able to break these. (They also havenメt eaten them, presumably because theyメre an onion) the ones I received were EXTREMELY healthy, nice roots, the majority are 16ヤ+ with many being 20ヤ+ extending to the top of my tank! Smallest was about 12ヤ Iメd recommend this plant.