Planted Tank Supplies

Setting up a planted tank requires specific supplies that a standard fish tank setup doesn't need, primarily better lighting, some form of CO2 (carbon dioxide for plant growth), and fertilizers to replace nutrients that plants consume. The exact supplies you need depend on how demanding the plants are that you want to grow. Easy plants like java fern, anubias, and cryptocoryne need minimal extra equipment. Demanding plants like carpeting grasses and high-light stem plants need a full high-tech setup.

This guide covers every supply category for planted tanks, from beginner-appropriate to full high-tech, with specific product recommendations and realistic cost expectations at each level.

Lighting: The Most Important Variable

Plants photosynthesize using light. Without sufficient intensity and the right spectrum, plants stop growing and algae wins. Light is the single supply that determines whether a planted tank succeeds or fails.

What Low-Tech Plants Need

Java fern, anubias, cryptocoryne, hornwort, and mosses are the workhorses of low-tech planted tanks. They grow slowly, tolerate lower light levels, and don't need CO2 injection.

For a 20 to 30-inch tank with these plants, a light delivering 20 to 50 micromoles of PAR (photosynthetically active radiation) at the substrate is sufficient. The Nicrew ClassicLED Plus at $30 to $45 handles this range. The Fluval Aquasky LED at $40 to $80 (depending on size) provides slightly better spectrum control and programmable intensity, making it a good step-up from basic LEDs.

Run lights 8 to 10 hours per day. A mechanical or smart outlet timer makes this consistent without manual switching.

What High-Tech Plants Need

Stem plants, dwarf hairgrass, Monte Carlo, and Hemianthus callitrichoides (HC Cuba) need PAR values of 80 or higher at the substrate to grow well. They also need CO2 to grow at all in most setups.

At this level, the Fluval Plant 3.0 ($60 to $120 depending on size) is the community standard recommendation. It has a fully programmable spectrum with a Bluetooth app, delivers excellent PAR output, and is available in multiple sizes to match common tank lengths.

The Chihiros WRGB II and the Twinstar series are alternatives at similar price points with strong planted tank performance. Both have built-in programmable sunrise and sunset functions and produce PAR numbers suitable for demanding plants.

CO2 Injection: When It's Necessary

CO2 is the building block of plant growth. Aquatic plants consume dissolved CO2 during photosynthesis. In most aquariums, CO2 is depleted to near-zero by mid-morning. Adding supplemental CO2 dramatically increases growth rates and makes it possible to grow plants that simply won't grow without it.

DIY CO2 (Budget Starting Point)

A DIY yeast reactor costs $10 to $20 to assemble and uses a mixture of sugar, yeast, and water in a plastic bottle connected to a diffuser via airline tubing. Output is approximately 0.5 to 1 bubble per second, enough for a tank under 20 gallons.

The downsides are real: output is inconsistent, there's no way to stop CO2 at night (continued injection during the dark period causes pH swings), and bottles need refreshing every 2 to 3 weeks. It's a good way to test whether CO2 makes a difference before investing in pressurized equipment.

Pressurized CO2 Systems

A pressurized CO2 system uses a gas cylinder, a dual-stage regulator with solenoid, a bubble counter, a diffuser, and a drop checker. The solenoid connects to a timer so CO2 turns on 1 hour before lights on and off when lights go off, matching plant photosynthesis cycles.

The Aquatek CO2 Regulator ($50 to $80) is the most commonly recommended budget regulator. Pair it with a 5-lb aluminum CO2 cylinder (available at welding supply shops, homebrew stores, or online). A 5-lb cylinder lasts 4 to 8 months in a 40-gallon tank at 2 bubbles per second. Refills cost $15 to $30 at local suppliers.

For diffusers, the Up Aqua CO2 diffuser and the Aquario Neo series produce fine bubbles efficiently. A ceramic diffuser placed near the filter intake maximizes CO2 distribution through the tank.

Target dissolved CO2 levels of 25 to 30 ppm. A glass drop checker with a reference solution turns yellow-green at the correct CO2 level. The SunGrow Glass CO2 Drop Checker is reliable and inexpensive at $8 to $12.

Fertilizers: Replacing What Plants Consume

Plants pull nitrogen, phosphorus, potassium, iron, and micronutrients from the water. In a low-tech tank with few plants and a light bioload, fish waste provides enough nutrients for easy plants. In a higher-tech setup with fast-growing plants, you need to dose fertilizer regularly.

All-in-One Liquid Fertilizers

Aquarium Co-Op Easy Green is the most recommended all-in-one fertilizer for planted aquariums. It contains nitrogen, phosphorus, potassium, and a complete micronutrient package including chelated iron. Dose 1 pump per 10 gallons once weekly in a low-tech tank, up to 3 times weekly in a high-tech setup. A 500ml bottle costs about $16.

Seachem Flourish covers micronutrients but not macros. If you go the Seachem route, you'll also need Seachem Nitrogen, Phosphorus, and Potassium separately, which adds complexity and cost but allows precise control over individual nutrients.

For a deeper look at how fertilizers fit into overall plant tank equipment, the Best Aquarium Equipment guide covers the tools serious planted tank hobbyists rely on.

Root Tabs

Root tabs provide nutrients directly to the substrate for root-feeding plants. Cryptocoryne, amazon sword, vallisneria, and dwarf sag all benefit from root tabs. Push one tab into the substrate every 6 inches around the base of root-feeding plants. Replace every 3 to 4 months.

Seachem Flourish Tabs and NilocG Thrive Caps are both reliable. A 10-pack costs $5 to $8 and lasts several months in a typical setup.

Substrate: What Goes on the Bottom

Substrate affects plant root development, water chemistry, and long-term nutrient availability. For planted tanks, substrate choice matters more than in a fish-only setup.

Nutrient-Rich Substrates

ADA Amazonia Aqua Soil is the gold standard. It's nutrient-rich, buffers pH to 6.5 to 7.0 (ideal for most tropical plants and shrimp), and has a soft texture that roots grow through easily. A 9-liter bag covers roughly a 20-gallon tank with a 2-inch depth and costs $25 to $50 depending on the retailer.

Fluval Stratum is a volcanic substrate that similarly buffers pH downward and contains trace minerals. It's slightly less expensive than ADA at $20 to $40 per bag and is a popular alternative.

Inert Substrates With Root Tabs

Plain gravel, pool filter sand, or black diamond blasting sand (available at hardware stores for about $8 per 50 pounds) work as planted tank substrates when combined with root tabs and water column fertilization. They don't buffer water chemistry, which can be an advantage if you prefer to control pH independently. Most plants grow well in inert substrate with adequate fertilization.

Hardscape and Planting Accessories

Hardscape (rocks and driftwood) creates the structure that aquascape designs are built around. Seiryu stone, Dragon stone (Ohko stone), and lava rock are common aquascape stones. Spiderwood, Malaysian driftwood, and Manzanita branches are popular wood choices.

Planting Tools

Stainless steel aquascape tools make planting much easier, especially for small carpeting plants. A set of curved and straight tweezers, scissors, and a spatula handles nearly all planting tasks. Aquarium Co-Op and JARDLI both sell complete tool sets for $20 to $40.

For plants like java fern and anubias, attach them to hardscape rather than burying the rhizome in substrate. Use super glue gel (cyanoacrylate is safe for aquarium use) or black cotton thread to attach the plant to wood or rock. The plant sends roots out over time and anchors itself permanently.

Circulation and CO2 Distribution

Good water flow distributes CO2, nutrients, and oxygen throughout the tank. For planted tanks, minimize surface agitation to slow CO2 off-gassing. A canister filter like the Fluval 107 or Eheim Classic 250 provides flow without excessive surface disruption.

Place a small powerhead or wave maker on the opposite wall from the filter output to ensure dead spots don't develop. Target total flow of 5 to 10 times the tank volume per hour in a planted setup.

For full equipment recommendations that pair with planted tanks, including lighting, filtration, and CO2 systems, the Top Aquarium Equipment guide covers what experienced planted tank hobbyists actually run.

FAQ

Do I need CO2 to grow aquarium plants? No, but your plant selection is significantly limited without it. Low-light plants like java fern, anubias, cryptocoryne, mosses, vallisneria, and hornwort grow without CO2. Carpeting plants, high-light stem plants, and most red plants require CO2 to grow well. If you start low-tech and want to expand to more demanding plants later, a pressurized CO2 system is the upgrade that makes the biggest difference.

What's the minimum budget for a beginner planted tank setup? A beginner planted tank setup, adding lighting, fertilizer, and a few low-light plants to a basic aquarium, can be done for $30 to $60 above what a standard fish tank costs. A Nicrew LED, a bottle of Easy Green, and a handful of java fern or anubias from a local hobbyist or online vendor is all you need to start.

How do I prevent algae in a planted tank? Balance is the key. Algae grows when nutrients, light, or CO2 are out of balance with plant demand. In a low-tech tank, keep the light period at 8 hours, start with a low fertilizer dose, and don't overstock the tank. In a high-tech tank, ensure CO2 is consistent and turns on before the lights. Add algae-eating livestock like amano shrimp, nerite snails, and otocinclus to provide mechanical algae control.

Can live plants replace a filter in a planted tank? No. Plants consume ammonia and nitrate, which helps water quality, but they don't provide the mechanical or biological filtration that a filter does. A filter is still essential in any planted tank with fish.

The Bottom Line

A successful planted tank comes down to getting three things right: adequate light for the plants you're growing, enough nutrients in the water column and substrate, and CO2 if you want to grow demanding species. Start simple with low-light plants, a basic LED, and a bottle of Easy Green. Once you understand how your setup responds, add CO2 and more demanding plants. The supplies scale with your ambition, but a beautiful planted tank doesn't require expensive gear to achieve.