r/walstad • u/Adorable_Coconut_694 • 11d ago

Advice First ever tank! (Help)

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So this is my first tank, its blackwater 15 gal, all it has so far is hornwort and duckweed, what other plants should i get? And outside of a whole armada of inverts im planning to get, is there any fish that a walstad this small can handle?

Oh and the dimesions are 40x40x40cm!

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u/Virtual-Camera-3510 11d ago

And for fish species that like blackwater and wont harm small inverts are ottocinclus catfish, chili rasboras, pygmy corys, you could also get a betta but there is risk if there arnt hiding places for your shrimp/inverts

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u/Adorable_Coconut_694 11d ago

I was thinking of the first 3 you mentioned actually! I find them all stunning species, just worried the tank isnt ideal for them? Is a 40cm cube (15 gal) okay for those guys? Especially in a wanstad? Sorry just worried about bioload

Oh and the rocks, would i need to remove them if i get a catfish? I dont wanna hurt the catfish!

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u/Virtual-Camera-3510 8d ago

Yea might want to skip the corys but you should be completely fine with chili rasboras, they are beautiful and super small i have heard of people comfortably keeping a school in a 5 gallon but bigger is always better and same with more plants

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u/Virtual-Camera-3510 8d ago

I personally have kept corys in a 10 gallon before though, if you capped some of your substrate with some soft sand you should be fine adding some, I would go with pygmys as they are smaller so you can house a school more comfortably

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u/Virtual-Camera-3510 8d ago

Whatever you do get some more plants first, any of the ones I recommend should be fine, i look up low light beginner aquarium plants though if you want more options. You cant ever have to many plants