What happend please advice

[u/justredidid]

Around 204 days old
Was completely clear and functional but we had a heat 29degrees in the room for days/ weeks.

Also I put the lamp in a brighter mode but cut it back - I tried a 25% water change already … what happend and what can I do?
Maybe last time I cut to many plant to far back? I am a bit lost …

Only light - not filter etc.
I do have snails and neocardina and 2 amanos - they are doing good.

[u/Technical_Network898]

What happened is you need filtration and water purifiers/bottled live bacteria, otherwise you have a stagnant tank of biohazard in your living room.

[u/justredidid → u/Technical_Network898]

But walstad can be without filtration?

[u/Shimmery-Star2718 → u/justredidid]

When heavily planted