I have four eastern spotted newts (Nvv)in a 29 gallon tank. The only plants I have are 2 floating strands of hornwort, each about one foot long. The rest of the tank is filled out with some artificial ivy vine, a turtle dock and a fake hiding log. I was looking to replace the fake ivy with real plants. I'm thinking now that my four little newts aren't going to be able to fertilize that many plants.