08-17-2010, 01:24 PM
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The Anubias is planted in the substrate, that will kill it if the rhizome is buried. Like Java Fern, it must be attached to something, wood or rock, and allowed to grow from there. The hole is probably unrelated to this; light and nutrients may be factors. Anubias likes shade, it should not be in direct light if possible. This yellowing then hole syndrome is more frequent on my plants when they are in direct light, weak though it may be. With overhanging plants, or floating plants, it will be better. But attach it to a small piece of wood or rock, you can move that around.
Koyoto rass is another common name (like Fountain Plant) for Ophiopogon japonicus. Although not a true aquatic, Hiscock says it can do quite well submersed in an aquarium. I had some years ago (25+) but can't remember how it fared.
Liquid fertilization will help all your plants, esp the Anubias and possibly the "fern" though I don't know what that may be. Flourish Comprehensive is what I recommend. Prob once weekly, it takes very little, 1/2 a tsp treats 30g.