How do you keep track of the fish you have...

I like your system, @CassCats. Ok, I'll play:

NANNOSTOMUS:

N. unifasciatus
N. eques
N. espei
N. marginatus
N. marilynae
N. anduzei
N. rubrocaudatus
N. mortenhtaleri
N. trifasciatus
N. minimus
N. beckfordi

TETRAS:

Paracheridon axelrodi “Cardinals”
Holopristis pulcher (alias Hemigrammus) “Garnet Tetra”

KILLIES:

Aphyosemion sp. Lobaye
Fundulopanchax filamentosus

BARBS:

Pethia setnai “Indigo Barb”
Pethia nigrofasciata “Black Ruby”
Pethis stoliczkana “Tic-Tac-Toe Barb”

RASBORA:

Brevibora dorsiocellata “Emerald Eye”

CORYS:

Hoplisoma metae
H. oiapoquensis
H. atropersonatum
H. similis
H. deckeri

BETTA:

B. splendens
 
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Are the NANNOSTOMUS all in the same tank?

No. They're spread around in various combinations. For example, N. unifasciatus (one of 4 populations), N. eques, N. espei, N. marginatus (one of 3 populations) and N. marilynae are in my 75g. N. beckfordi and N. trifasciatus can be quite territorial (for a Nannostomus) so in their respective tanks they are the only Nannostomus present. The tinies--N. anduzei and N. minimus-- are together in a 20g... and so on.
 
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No. They're spread around in various combinations. For example, N. unifasciatus (one of 4 populations), N. eques, N. espei, N. marginatus (one of 3 populations) and N. marilynae are in my 75g. N. beckfordi and N. trifasciatus can be quite terriorial (for a Nannostomus) so in their respective tanks they are the only Nannostomus present. The tinies--N. anduzei and N. minimus are together in a 20g... and so on.
Sounds wonderful. While we’re on the subject of Nannostomus, I have two questions. In February I will place a trio of Apistogramma cacatuoides in my new breeding tank. 1) What species of Nannostomus do you recommend to be the dither fish? 2) Will such a species prey on the fry? Thanks.
 
I haven't kept Apistos for years and never used Nannostomus as dithers for them, but many do, and some have become Nannostomus-devotees as a result. Most prominently is Tom C in Europe who has a terrific Apisto/Nannostomus site:

https://tomc.no/default.aspx

The Nannostomus info is listed under "Lebiasinidae" in the home page sidebar. He talks about compatibility. If I recall, he especially likes N. unifasciatus for this purpose, which also happens to be my favorite species for any purpose. He and I have exchanged emails for years and shared our experiences with various species. He has collected in the Amazon many times and once asked me to join him. I said, "Tom, you've got the wrong guy. If it doesn't involve room service, it's not for me."
 
N. Eques is my favourite of them, they're on my bucket list for fish. I dream big 🤣

But most my tanks are higher flow, nannostomus may not be happy with that, so they're a far future thing
 
Well, I'm old school, as some of you know. I used to keep a notebook of current stock. But now I have many fewer species so I can just remember all 7 of them...but maybe not they're current names...Plants are more difficult, I don't even try much anymore...
 
... and as much as I'd like to do a small picture of each fish, for reference... I think a link to my favorite picture of each fish. will keep it cleaner, and easier to keep it to 1-2 pages per tank... my Hillstream tank is going to be the biggest challenge, and where the pictures for me will be a big help, as some are n defined, and I have no idea what they look like by name... most of the other tanks, I can see the fish in my mind, by name, but I just can't do that yet with the hillstream's... maybe if I get used to seeing the pictures with the names, I'll get there some day???
 

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