If this were me, I'd divide up the Marine section into just four sections:
- Saltwater/Reef Chit Chat - Make this the area for genera discussion about starting out in the hobby, recommendations of books and shops, discussions about food, breeding reports, and so on.
- Saltwater Emergencies and Health - Here's where people would post problems.
- Saltwater Fish and Invertebrates - Discussions about the needs of specific fish, compatibility with other species; focused on the needs of fish and invertebrate species, rather than maintenance, which overlaps with hardware, chit-chat and healthcare topics.
- Saltwater Hardware - Discussions on filters, lights, and so on.
The
Nano Reefs section is only questionably distinct from the others, since much of what happens here would be equally suited to the other sections. Is treating Marine Ick in a nano tank any different to treating it anywhere else? Do corals in nano tanks have different requirements in terms of allelopathy or water chemistry? When is a nano tank just a small aquarium into which too much livestock has been dumped? But I suspect there would be a fair number of people who would prefer the Nano Reefs section being left separate from the others.
Yes, there are problems with over-splitting forums. When is a healthcare issue actually one about water quality? When does an oddball fish become a predator? Is treating finrot on an angelfish a neotropical cichlid issue or a healthcare issue? There are some sections that make obvious sense as standalone sections, for example brackish water fish, because they're almost hobbies in themselves. But beyond such obvious examples, distinctions between forums and subforums inevitably end up being arbitrary, and as such, confusing to anyone who doesn't know the layout of TFF more generally.
Cheers, Neale