[What would be in your unfiltered aquarium?]

Thanks @Daniel & @Streetwise good information.

[What would be in your unfiltered aquarium?]

1 hour ago, Daniel said:

The majority of my aquariums run without any filters. A couple of my favorites are:

The 1930s aquarium (no lights, no filter, no heater):

My livingroom aquarium has a heater (because of discus) but no filtration:

Both tanks are very low maintenance.

Hi Daniel,

How often do you do water changes on your livingroom tank? I’m thinking of taking out my one sponge filter in my 40 gallon tank. Its a sand substrate moderately planted. Do you worry about nitrates & debris build up with no filter?

cheers
 

[Red tiger lotus produce Toxins?]

I’m no expert. Maybe do a search on Allelopathy / Diana Walstad.

From Diana Walstads Book.

”Aquatic plants contain a variety of allelochemicals whose primary function is to protect the plant from being eaten by fish and  insects or being destroyed by disease”

I’m not sure if this would be the case with your Red Tiger Lotus.

[Nano sponge fiter]

This should help.