Hi there seems to be a bit of conflicting info in the thread here so just going to see if I can make it a bit clearer
coolie loach - Khulli Loaches - do best in groups the more the better otherwise they hide a lot. Quite easy to keep 10g might be a bit small for them but depends on the dimensions?
dwarf puffer - Dwarf Puffers - as said they are very nippy fish that are slightly aggressive the problem is they have beaks and when they nip or bit other fish they do a substantial amount of damage - however a trio of these would work in a 10g tank so on their own they are perhaps worth considering
dwarf rasbora - Dwarf Rasboras - which one? There are quite a few different types of Dwarf Rasboras like Celestial Pearl Danios or Chilli Rasboras those are probably the most common at the moment but there are others around and also other species that are sometimes tagged with this name like Lampeyes
January tetra - I dont have much knowledge on these fish but this is an excellent profile on them so is probably worth a read if your thinking of keeping them
http
/www.seriouslyfish.com/species/hemigrammus-hyanuary/ - they do sound like a nice fish though
jumbo coolie - When you see the word jumbo in a shop all it means is they are bigger its not a different type of fish just older and more mature so exactly the same as the other Khuli Loach I mentioned earlier. Its always important to plan a tank around the adult sizes and behavior of the fish you want to keep
penguin fish - Penguin Tetras - they are quite a large tetra and in a 10g they not the best choice. If you like the body shape and the head up type swimming one of the dwarf species of pencil fish would work great. Also dont be fooled into the common name that was given to them - they dont really look like Penguins do they? Its just a cute name that was assigned to a fish in a few shops that made it popular do to the relation to the animal - for example think of it this way if they called it a Black Tail Tetra would you be as interested? Same for the Elephant Nose Fish - if it was just called a Long Nosed Fish I guarantee the sales in the fish would drop.
long fin German ram - Blue Rams - Blue Rams in all their forms are a tough fish to keep, the Golds, Blues, Electric Blues, the long finned and the balloon are all the same fish just intensively line bred for their looks. They are hard to keep because it depends on the lineage and the family members of the fish that you are keeping - the fish closer to wild generally need high temperatures and low ph where as those that have been bred on a farm for a fair few generations need neutral ph and more mid line temperatures but it is incredibly hard to know where the fish have come from unless you find a local breeder that has a few generations in your local tap water. Even the fancy developments like balloon and long finned rams could only be one or two generations from wild as the grandparents could be wild and the parents could be the F1 spawn who hatched with extra long fins then these were bred to create a batch of only long finned fish which are then sold on.... A 10g tank for these is a little small but a pair are quite well managed in tanks of 90 liters or more.
hill stream loach - Hill Stream Loaches can be hard to keep as said above they are best kept in fast flowing cooler water which often makes them unsuitable to a true tropical tank its also hard to replicate the flow they need in a smaller tank as well.
twig catfish - The name Twig Catfish generally refers to a family of fish called Farlowella - they are quite a big fish when adult so would be no good for a 10g like this - they are also incredibly hard to keep long term - ie past about 4-5 months. In the wild part of their natural diet provides a number of nutrients and enzymes in their digestive system and it is almost impossible to recreate this in any tank. For me the similar looking Whiptail Catfish are a much better choice for aquariums and IMO Farlowella should just be left in the wild...
white clouds - I hate having to correct other posts here but White Cloud Minnows are not livebearers - They are egg scatterers like other Cypronids and are actually quite hard to breed in a community tank
any inverts - as said a very broad term - I am wondering if you have picked this up from Marine tank terminology where their inverts are quite important to the well being of the tank where as in fresh water tanks they are more of an aesthetic thing.
As said above I would switch to sand as it does open up more opportunities for fish in the tank where as very few if any fish actually need gravel - gravel is popular in tanks and so readily available as 15-20 years ago a popular filtration method was undergravel filters which meant that your gravel bed at the bottom of the tank acted as the filter media like bioballs or plastic hoops etc do in your filter today.
I think the trick to these tanks is always to look for fish with Micro or Pygmy in their name most Dwarf fish will take up too much space and limit how many other fish you have. I am also a great believer that in 90% of cases there are always always smaller alternatives to fish and I dont think your list above is much different. If it were my 10g I would switch to sand and look to do something like this.
Going on the assumption that this is a true 10g tank around the 64 liter mark and not a slightly smaller one that has been rounded up.
3 Pygmy Gourami - in place of the Long Finned Rams - nice sparkly blue fish that will act as a nice centre piece
6 Galaxy Rasboras - as the school of Dwarf Rasboras - Chilli Rasboras are better in higher temperatures so these fit in this tank better
5 Rosy Loach - instead of the Khulli Loaches - small serpentine, eely type loaches that get a nice red colour to them but stay smaller the Khulli
3 Hara Catfish - also known as Anchor Catfish or Moth Catfish - I put these in just as a bit of an oddball they are not that common but add an extra shape in the tank in the same way a Twig Catfish would or a Hill Stream Loach
4-5 Bee Shrimp - shrimp always do great in small tanks and if you start off with a small number the colony will soon grow I put in Bee Shrimp as they really do stay quite tiny and since you have nothing that would be a predator to the adults they would be quite safe while at the same time some of the fish would stop you getting inundated with babies when they do start breeding.
The other thing I always think is a good idea with these small tanks is to look at one of the nano tank external filters it takes the filter box out of the tank which does free up a bit of space in the tank and it also does look better over all so could be worth considering.
Hope that helps and sorry for such the long posts, I tend to get carried away...
Wills
