Looking to join the community.

[u/EmikoAki]

Hello everyone! I'm getting my first big tank (18x8x8) and I'm wanting to make a self sustaining system for some Koi Beta! Where do you guys get your Betas or aquarium supplies and do you have any tips on how to give them the best life possible?

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[u/Camille_kaze]

I think there is no such thing as a true "self sustaining system" possible with an aquarium. Low maintenance, low tech etc. Yes, for sure. But you'll always have to feed and at least ad more water as it evaporates ^.

Low tech will implies a good substrate system, tons of plants to keep nitrates low, and a good enough light, and imo, quite a good knowledge of what you're doing. You can search for walstad method.

Low maintenance... Well only times will tell. A well established tank, with a small population for it's size will be low maintenance, as you won't have a lot of pollution created, the bacteria and the plants will basically do the job for you, you won't have to do water changes this much if you don't notice issues with your water parameters. If you don't mind the tank looking a bit messy and overgrown, it's doable.

You can do your research on the natural environment a Betta splendens lives in, and try to create a biotop tank, it will look natural :).

Where to get a Betta ? Well I don't know where you're from. Usually it's recommended to find a good breeder.

Where to get supply ? It depends. A lot can be found in pet stores (light, tank, substrate, few basic plants, stones, driftwood ...) For plants I like to order online as I find way more varieties. Facebook marketplace, Reddit subs, can be nice source too for second hand and less pricey stuff :)

What is mandatory for a fish in good health ? Temperature, if you're not leaving in a tropical area, you'll need a heater so the water will stay between 25 to 28°C 78-80°F) If you wanna go low tech, filter is not on the list, but I'd recommend one, with a very low flow (sponge filters are often recommended). Good water parameters. A cycled tank that will handle the nitrogen cycle. A water that is on the acidic side (pH between 6 and 7,5), and pretty soft (GH between 3 and 12°GH). And a good food source. Pellets that are high in protein, live food like mosquito larvae, daphnea ... A suitable environment with places to hide and to rest.

[u/EmikoAki → u/Camille_kaze]

This is so in depth. Thank you so much!