I have a large amount (approx 40 grouped in lots of 5 or 6) of Cabomba
cuttings in my 48" x 15" x 12" tropical freshwater aquarium which is
filtered by an UG filter and an 800lph Canister Filter. The tank also
recieves around 10-12 hours of light per day. My substrate is small gravel
and I regulary add plant fertilizer to the tank (generally after the weekly
water change). My problem is that the Cabomba cuttings rot at the base just
below the gravel and break off and float aorund the tank. The tank also
contains around 30 cuttings of Myriophyllum and 20 of Hygrophilia but they
don't rot like the Cabomba does. Every article I can find about Cabomba says
that it is fine for gravel but none mention this problem I keep having.


Does anyone know what I am doing wrong and the best way to fix it? Its just
getting annoying having to constantly replant those cuttings that keep
floating away!