It's pronounced like "sick-lids". They should be just by themselves (as far as fish in the water-column), though if you acclimate them very slowly, you can also have plecos (suckerfish), and some kinds of catfish.
If you want other ideas for a biotype tank, call your local bookstore (or library, or fish club) and see if they carry the book "The Complete Aquarium" by Peter W. Scott. That book has many ideas for types of tanks, has wonderful photos, and instructions how to replicate many different natural areas of the world - using rocks, gravel, plants, wood, sand, and/or other combinations of decorations.
Amazon reader has it here:
Amazon Online Reader : Complete Aquarium
However, none of the "meaty" pages are included in that index, just the beginning and end of the book are. Check it out if you can find it around your area...
Regards

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