Best Indoor House Plants for Fish Tanks in 2026

Best Indoor House Plants for Fish Tanks: Turn your aquarium into an underwater garden! Find out the most effective indoor house plants in fish tanks. 2026 revised list of beautiful and low-maintenance home decor.Whether you have a pet fish or you have fish in your house, then you might have come across a common dilemma; which plants are to be added to the fish tank to make the fish happy and have a good environment?

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I have also often observed that in many instances fish fail to obtain a sufficient quantity of oxygen; and when they do, the amounts of CO2 usually become excessive. Hence, there is need to have a good balance between these two levels to have a conducive living environment to the fish. But, in spite of all efforts such as trying lighting and varying the substrate I still did not find that they were actually in a really natural environment.

Aquarium plants

These are not the typical aquarium plants that are submerged such as Java fern or the Anubias. We are discussing the real indoor house plants whose roots actually submerge in the tank waters. The foliage remains elevated and dry above the ground forming a green canopy that transforms the entire structure into a living room jungle and a prospering reef. Best part? They are like a free, natural filter sucking up nitrates, ammonia and phosphates that would otherwise muddy your water or get your fish into a frenzy.

I have tried dozens, over the years, in 10-gallon betta bowls as well as 125-gallon communal tanks. The seven below have demonstrated themselves over and over again to be reliable, low maintenance and truly beautiful. No fiddle, merely the outcomes of actual tanks.

The reasons why the Indoor House plants should be in your fish tank set up?

The waste of fish is dissolved in the water and becomes nitrates. When these levels are too high, the algae will start to grow in the fish tank and a weekly change of water is required. All one needs to do is to put the roots of an indoor house plant in the water and it will start to act as a living bio-filter.They extract nutrients directly out of the water (much more effectively than most submerged plants, which get the complete supply of CO2 out of the air).

You have better water, more cheerful fish and a tank that comes out of a nature show that looks like it came out of one. Moreover an open-top tank provides the humidity that also leaves the leaves of the plants happy thus making it ideal to those tropical species, which would otherwise dry out in the dry apartments.

Quick Set up Guide – Only Once and Your Done.

Take a fine cutting or small potted plant in your neighborhood nursery (or out of your collection).

Squeeze all the soil off the roots under a little lukewarm tap water–soil in the tank = an ammonia spike.

Cut away any burnt leaves or excessively long roots.

Keep the stem safe such that the roots (or lower stem) are in the water only. Install aquarium-safe suction-cup clips, airline tubing, rim clips or just stuff them into a hang-on-back filter or breeder box.

Always have leaves fully out of water, they rot when covered.

Allow it a week or two. It will sprout new white roots as soon as the plant discovers that it is on an all-you-can-eat nutrient buffet.

That’s it. No special lights, no fancy substrate. Existing tank lighting is normally sufficient.

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2. Pothos (Devil’s Ivy) – The Tank MVP.

One, should I have to choose, is pothos. Golden, marble queen, neon, Cebu blue all kinds that I have tried have flourished. The vines cover the rim beautifully and the roots are thick white tentacle-like and wriggle through the water column as they do underwater.

Only one pothos cut lowered the nitrates in my 55-gallon community tank by three weeks to less than 10 ppm. Shrimp are fond of being in the roots, and the plant is so quick that you will have to do it a pruning a month. It does low light, bright light and all the shades in between. Then only watch that you do not let the vines go too far down, or they will shady up your under-water plants. Pro tip: roll it on the wall behind the tank to achieve the appearance of jungle spilling over.