Comments on: 10.13.1. Hydra https://tankstartguide.com Based on Science and Logic Sat, 30 Mar 2024 12:09:57 +0000 hourly 1 By: Sasha https://tankstartguide.com/10-13-1-hydra/#comment-1816 Sat, 30 Mar 2024 12:09:57 +0000 http://tankstartguide.com/?page_id=1746#comment-1816 I have a dirted 3L jar “ecosystem” with plants that I once set up for 5 dwarf shrimp to try my hand at the Walstad method. Then green hydra started apearing here and there. I was worried and wanted a more “natural” solution so I could get rid of hydra but keep all the remaining biodivercity in there (cyclops, ostracods, detritus worms, beneficial bacteria; also an apple snail that already lived in there, neocaridina shrimp).
I’ve read on aquariumbreader.com that Asolene Spixi snails can sometimes eat hydra. I bought one and it realy did. I even tryed placing it manually on affected leaves and rocks a couple times – once in close proximity, the snail seemed to target it and individual hydra seemed to disappear after the encounter. I was very proud of my new snail. After maybe a week I didn’t see any hydra in the jar anymore. 100% recommend.

I would sum up my anecdote like this: one Asolene Spixi may be enough to get rid of green hydra (photosynthetic ability of it may or may not be a factor) in a 3L filterless dirted planted set up. Pomacea diffusa ignore hydra.

P.S. my eanglish may be broken, sorry

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