hmm i may have to spend more time on my goldfish tank after seeing someone else try. i did plant crypt wendtii in my 10 gallon. the two in theres only touch it if they go without food for too long. yes i know 10 al is small for two golds(ones a koi, yikes!) but theyve been in their for 3 years now, water peram's are good and theyre happy. i have two filters turning the ater over, and a good amount of crypt helping eat stuff up.
i love the sand, but i always thought that would pose a health hazard? especially cause mine like to pick through the rocks.