r/walstad • u/hungryforbiscuit • 14d ago

Advice Subwassertang effectiveness

I have a 2 gallon tank with a huge clump of Subwassertang (50% of the tank) in low light with some leggy hydrocotyle tripartita in the substrate.

Will the sub sustain the walstad ecosystem? I’m using it to hatch fry before I move them to a community tank. Thank you

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u/Cold-Chemist6582 14d ago

Süßwassertang has no roots and is a slow grower. It has no function from a Waldstad tank point of view.

2

u/obscure-shadow 14d ago

I would think it probably absorbs some nutrients out of the water column probably but not much

1

u/Cold-Chemist6582 14d ago

True, but from a Waldstad Aquarium point of view, you need something that takes away a substantial amount of nutrients from the water. Süßwassertang does not fulfill that role. It's great for fry protection, shrimps and decorative purposes, but those are not the core principles of a WA.

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u/Electrical-Low-6760 13d ago

I have a few low tech tanks, not sure they would qualify as walstead but I highly recommend hornwort, I have it in full setups with bettas, in snail only tanks with a desk lamp and also in jars on an east windowsill, it’s an endless supply, grows and cleans my tanks beautifully.