[thankgodforthesuffering]

I suppose you could just shove them in deeper, but I have had problems with that method.....yeah sometimes it works but most of the time the bottom of the stem rots away, the plant then grows no root system and again your plants are floating. I use "plant weights." They are little lead strips that are made just for this problem. You cut them in a little quarter inch piece and wrap it around the base of the stem(not too tight tho you can crush the stem, which cuts off nutrients from getting to the rest of the plant). Then you drop the stem in the tank and it sinks to the bottom. This way the bottom of the stem sits atop the substrate allowing roots to grow and take hold. Good luck