There is a lovely computer program with a data base to fish and plants. The program is Aquarix, and I purchased it via the net, it is a very lovely program when it comes to the various fish species with colour pics per fish, but importantly, the plant data base is excellent. There are species which are not there, but I have been inserting and improving my data base for quick reference. If anybodies interested, go to Aquarix.de, download, and for a small fee you get the full version with an unlock key. This program has also other features, but do not just take my word for it, CHECK IT OUT!!!!!!