Your shopping brief.
Start with your tank’s dimensions. A calculated plan can arrive here with its quantity, bag options and costs.
Calculate my quantityBring the plan, not only the gallon label.
“60 × 30 cm, a flat 5 cm bed, 9 liters” gives a dealer a plan to work with. “A 20-gallon tank” leaves the floor and bed depth unstated.
Keep any extra allowance visible. A 9-liter base plus 10% is 9.9 liters before rounding to bags. Work through the brief below with the actual product label beside you.
Confirm the exact material and pack.
Write down the full product name and pack quantity. Make sure the listing, shelf ticket and bag refer to the same item.
If the bag is sold in kilograms, ask where its volume or bulk-density figure comes from and which pack it applies to. Keep the answer with the plan. A familiar brand name does not resolve that relationship.
Check whole bags and the leftover together.
Compare the total amount supplied. Two 5-liter packs cover a 9.9-liter requirement and leave 0.1 liter. Another format can change both the bag count and the spare.
If your calculation gives a range, keep that range on the list. Better product-specific information is more useful than an unsupported single number.
Ask for the price you will actually pay.
Ask for the cost of the exact quantity, including delivery and other applicable charges. A displayed bag price is only one part of that total.
For a local visit, check availability before traveling. Tropica’s finder accepts country, city or postal-code searches, and Seachem provides dealer and online-dealer directories. A listing is a route to a supplier, not a stock confirmation.
Leave room for buying nothing today.
Check suitable material you already own before adding more. If its identity, condition or quantity is uncertain, resolve that separately from the arithmetic.
You can keep the plan, ask another question or compare a different pack. Substrate planning does not require adding every accessory displayed beside it.
Keep the label with the final plan.
Keep the final label and revised assumptions with your plan. They will be more useful later than a remembered number of bags.
Download your checked brief above, or return to the calculator to save the dimensions and pack options on this device.
The official product and dealer routes below were checked on November 9, 2026. These are ordinary reference links. Confirm product suitability, current stock and final costs with the supplier.
- Tropica: Aquarium Soil details and volume method ↗An official product-specific reference for checking the manufacturer's volume method and directions.
- Tropica: find dealers ↗A country, city or postal-code dealer lookup; contact dealers to confirm availability.
- Seachem: dealer locator ↗An official external dealer-locator destination.
- Seachem: online dealers ↗An official online-dealer directory, without a promise of present inventory.