Hello Adam If you plan on using hornwort as your floating plants on top of your tanks, just remember they need alot of light or they will decay fast in poor light and then foul your water. I have a tendency to use water sprite as my floating plants... i have tons of it .... also use large salvinia and frog bit.... even floatiing Vals without rooting them works great ... you should see my 55 gallon tank with my platies in there..... the vals spread like tenellus across the top.... runners all over the place.. makes a nice 8 inch deep top planted tank..... looks great!! John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto