In a brand-new planted tank, start with a nutrient-rich substrate (or root tabs) and a light all-in-one liquid - then ease into regular dosing as plants establish over the first few weeks. Here's exactly what to use first, in order.
Step 1 - substrate, at setup
The best time to add root nutrition is before the tank is filled. Lay an aquasoil, or push Sunken Garden Root Tabs or TPRS Root Boost+ into the substrate where you'll plant root-feeders like swords and crypts.
Step 2 - go light for the first few weeks
A new tank is still cycling and plants are settling, so dose an all-in-one like Sunken Garden Green lightly (or Seachem Flourish). Don't overdose an immature tank - it invites algae before plants can compete. A bacteria/biofilm booster like Sunken Garden Bacter Tabs helps establish healthy substrate biology.
Step 3 - settle into a routine
Once plants show clear new growth (usually 2-3 weeks), move to steady weekly dosing matched to your light and CO2 - see our how-often guide, dosing guide, and the full planted-tank setup guide.
Frequently asked questions
What fertilizer should I use first in a new planted tank?
Start with a rich substrate or root tabs at setup, then a lightly dosed all-in-one liquid for the first few weeks.
When should I start dosing liquid fertilizer in a new tank?
You can start light dosing right away, then increase to a normal weekly routine once plants show new growth (around 2-3 weeks).
Will fertilizer cause algae in a new tank?
Only if you overdose an immature tank - keep doses light early, do regular water changes, and let plants establish.
Do I need root tabs and liquid fertilizer for a new tank?
Root tabs (or aquasoil) for root-feeders, plus a water-column all-in-one for the rest - together they cover a new planted tank.
Should I add bacteria to a new planted tank?
Yes - a bacteria starter or Bacter Tabs helps establish the nitrogen cycle and substrate biology faster.
How much fertilizer for a newly planted tank?
Half the normal dose to start; build up to a full weekly routine as plants take off.
Start your planted tank right with Sunken Garden fertilisers, root tabs and Bacter Tabs from Fish Bazaar, delivered across India.
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