Photo: Abhik.Mazumdar.73 · CC BY 4.0
setup · freshwater
Low-tech planted aquarium for beginners
A cycled 10–20 gallon, inert gravel or sand, root tabs under crypts, and epiphytes tied to wood, with 6–8 hours of light on a timer. No pressurized CO2 required.
Published 2026-09-15
Start from a cycled tank, not a scape fantasy
A low-tech planted aquarium is a heated, filtered 10–20 gallon that already finished its nitrogen cycle, then got plants that tolerate ordinary light. It is not a pressurized-CO2 aquascape contest tank, and it is not the same job as the beginner freshwater setup guide, that page gets water moving and livestock waiting. This page is about which plants to buy and how to keep them alive without a chemistry hobby.
Use inert gravel or sand you can siphon. Put root tabs under crypts and Amazon swords. Tie anubias, java fern, and java moss to wood or rock so the rhizome stays uncovered. Skip high-tech aqua soil and a CO2 bottle for this first planted tank.
Three plants you can actually buy
Anubias (often Anubias barteri var. nana): thick leaves, slow growth, attaches to hardscape. Do not bury the rhizome. Java fern (Microsorum pteropus): same rule, rhizome on wood or rock, not under gravel. Java moss: tuck into crevices or tie loosely; shrimp and fry use it as cover.
Add one root feeder for the substrate: a crypt (Cryptocoryne) with a root tab nearby. Crypts often melt after a move; leave the crown and wait for new leaves. That trio, anubias, java fern, crypt, covers what most chain stores and online plant packs actually stock.
Light, ferts, and the algae trap
Six to eight hours on a timer is the default. More light without plants that grow, and without a fertilizer plan, mostly grows algae. See the aquarium LED light page for sizing a bar to a 10 or 20, and the aquarium algae guide when the glass goes green on day twelve of a ten-hour schedule.
Root tabs feed crypts. Liquid micros (optional) help epiphytes pull from the water column, dose lightly; overdosing is an easy way to feed hair algae. You do not need a full high-tech NPK line on a first low-tech 20. Fish waste covers some nutrients; water changes still matter.
Livestock that will not shred the scape
Cherry barbs, harlequin rasboras, honey gourami, adult cherry shrimp, and a cory group on sand fit a planted community. Otos need an established tank with biofilm. Goldfish and oscars will eat or dig this layout, they belong on their own pages with different tanks.
Plant first when you can, then add fish after the plants settle and the cycle still reads zero ammonia and nitrite. A planted tank still needs the usual 25–30% weekly water change; plants are not a license to skip the siphon.
Gear that makes low-tech plants work
A few listings we would open for this job. Skip anything you already own that still works.
Seachem Flourish Tabs, 10 count
Crypts and other root feeders need food in the gravel, not just in the water column. Tabs under the roots beat guessing with liquid alone.
Push a tab midway into the substrate near each crypt cluster. Replace every few months as the maker directs. Skip burying tabs under anubias or java fern rhizomes. Those plants feed from the water and rot if the rhizome is buried.
See this listingNICREW ClassicLED Plus, 18–24 inch
Even, white-ish light sized to a 10-gallon footprint is enough for anubias, java fern, moss, and crypts. You do not need a reef-blast fixture for low-tech.
Set 6–8 hours on the built-in timer, not the longest preset. A 20-gallon long may want the 24–30 inch class instead, see the aquarium LED light page. Skip this if a working hood already covers the tank and you only need a schedule.
See this listingBN-LINK 24-hour mechanical outlet timer
Consistent photoperiod is the cheapest algae lever. Peg 6–8 hours on so day-12 of ten-hour lighting does not coat the glass in green.
Grounded indoor timer for hoods and simple bars without a built-in schedule. Put a drip loop in the cord. Skip stacking this on a fixture that already has a programmable controller.
See this listing
Frequently asked questions
Do I need CO2 for a planted aquarium?+
Not for a low-tech setup. Anubias, java fern, java moss, and many crypts grow without pressurized CO2 if light stays at 6–8 hours and you feed the roots that need it.
Why are my new plants melting?+
Common after shipping, especially on crypts. Trim dead leaves, leave the healthy crown, keep parameters stable, and wait. Meltdown is not always a reason to yank the plant on day three.
Can I bury anubias and java fern?+
No. Tie or glue the rhizome to wood or rock and leave it exposed. Burying the rhizome is how those plants rot.
What fish belong in a low-tech planted tank?+
Cherry barbs, harlequin rasboras, honey gourami, cherry shrimp, and cories are a good start. Goldfish and oscars will eat or uproot this scape.