20-Gallon Low-Tech Iwagumi Aquascape (Beginner)
A 20-gallon Iwagumi aquascape planned for a low-tech setup and a beginner aquarist. It pairs 4 plant species with a 4-group stocking list, built around Seiryu Stone. Everything below is sized to the tank and matched to the beginner skill level.
Generate this exact design in the studio →Hardscape & layout
Built around Seiryu Stone. Place the largest piece off-centre on the golden ratio, angled slightly back, with smaller supporting pieces stepping away from it.
Substrate
Aqua soil or capped organic base, capped with fine natural gravel/sand cap, built to about 2–3" deep. A nutrient base keeps low-tech plants fed; cap with fine gravel. Slope higher at the back.
Plant list & placement
| Plant | Placement | Quantity | Needs | Buy |
|---|---|---|---|---|
| Dwarf Hairgrass Mini Eleocharis sp. 'Mini' | Carpet | 6 pots | Light: medium · CO₂: recommended | Buy at Buce Plant |
| Cryptocoryne parva Cryptocoryne parva | Foreground | 6 pots | Light: low · CO₂: not required | Buy at Buce Plant |
| Rotala rotundifolia (green) Rotala rotundifolia | Background | 2 bunches | Light: medium · CO₂: recommended | Buy at Buce Plant |
| Anubias nana 'Petite' Anubias barteri var. nana 'Petite' | Epiphyte | 2 portions | Light: low · CO₂: not required | Buy at Buce Plant |
Stocking list
| Species | Suggested count | Type | Buy |
|---|---|---|---|
| Checkered Barb Oliotius oligolepis | 8 | Semi-aggressive | Buy at Flip Aquatics |
| Betta (Siamese Fighting Fish) Betta splendens | 1 | Semi_aggressive | Buy at Flip Aquatics |
| Corumba Apisto Apistogramma commbrae | 4 | Semi-aggressive | Buy at Flip Aquatics |
| Amano Shrimp Caridina multidentata | 5 | Invertebrate | Buy at Flip Aquatics |
Equipment
| Category | Recommendation | Price | Buy |
|---|---|---|---|
| Filtration | Aquaclear 20 Power Filter (HOB) | ~$32–45 | Buy at Green Leaf Aquariums |
| Lighting | Nicrew ClassicLED Plus 24–30" | ~$30–44 | Buy at Green Leaf Aquariums |
| Heating | Eheim Jager 100W | ~$27–38 | Buy at Chewy |
| Substrate | Fluval Stratum 17.6lb | ~$48–65 | Buy at Buce Plant |
| Fertilizer | Seachem Flourish Comprehensive 250ml | ~$8–14 | Buy at Buce Plant |
| Testkit | API Freshwater Master Test Kit | ~$28–42 | Buy at Aquarium Co-Op |
| Water treatment | Seachem Prime 500ml | ~$12–20 | Buy at Aquarium Co-Op |
| Bacteria | Seachem Stability 250ml | ~$8–14 | Buy at Aquarium Co-Op |
Care schedule
| Daily | Feed lightly; a quick glance for anything unusual. |
| Weekly | 25–30% water change, light fertilizer dose, wipe the glass, quick trim. |
| Monthly | Rinse filter media in old tank water; test KH, GH, and pH; deep-trim and replant tops. |
| As needed | Top off evaporation with dechlorinated water; spot-clean algae. |