Floating Plants with tank cover.

HI
I have a 240L covered tank with lighting a HeliaLux Spectrum.

I am looking for a floating plant that can survive with a cover.
I am thinking that the lighting could get to intense for a plant.
I have medium Nitrate reading and was hoping a floating plant could help with this.
The lighting has a different setting each day but never gets over 75% for any colour.

Also, ideally do not want a plant that will take over the surface of the tank (maybe I am asking to much)!

 

Frogbit and salvinia both do well for me in a tank with a lid. They can grow pretty fast, I just threw some out with each water change.

My water has a ph around 8.2 and is very hard.

 

A

HI
I have a 240L covered tank with lighting a HeliaLux Spectrum.

I am looking for a floating plant that can survive with a cover.
I am thinking that the lighting could get to intense for a plant.
I have medium Nitrate reading and was hoping a floating plant could help with this.
The lighting has a different setting each day but never gets over 75% for any colour.

Also, ideally do not want a plant that will take over the surface of the tank (maybe I am asking to much)!

Amazon frogbit is easy to care for and Wouldn’t completely over take a tank

 

Duckweed is the only one I had trouble getting rid of.

 

use CO2/air tubing, cut in pieces, squeeze one end into the other end to create floating circles and thereby open areas where floaters cant enter (easily)

 

use CO2/air tubing, cut in pieces, squeeze one end into the other end to create floating circles and thereby open areas where floaters cant enter (easily)

I do a similar thing but attach the two ends of the air tube to those sucker things that are used for heaters and make a semicircle attached to the glass at both ends.

I have water lettuce in all my tanks and all have lids (hood types, not glass). Yes, they reduce nitrates to very low levels. In stronger light plus more flow they grow smaller leaves and shorter roots. In lower light, lower flow tanks the leaves grow much bigger and the roots much longer, I have had them flower in these tanks as well.