Seachem Flourish Excel

Want stronger plant growth without installing a full CO₂ system? Battling stubborn algae in your planted tank?

Seachem Flourish Excel 250mL is a bioavailable liquid carbon supplement designed to enhance plant growth and improve overall aquascape health. It provides a readily usable organic carbon source, which is one of the most critical components of plant photosynthesis.

Excel is ideal for low-tech planted tanks without injected CO₂, and also highly effective as a supplemental carbon source in high-tech systems.

What It Helps Fix

✔ Slow or weak plant growth
✔ Carbon deficiency in non-CO₂ tanks
✔ Black beard algae (BBA)
✔ Stalled carpeting plants
✔ Poor plant density and leaf mass

Flourish Excel is widely used as part of algae control strategies — particularly for managing black beard algae when used correctly.

How You Know You Need It

• You run a planted tank without CO₂ injection

• Plants grow slowly despite fertiliser dosing

• You’re battling BBA or nuisance algae

• You want thicker, denser plant growth

• You’re setting up a low-tech aquascape

Carbon is often the single most limiting nutrient in planted aquariums.

Dosage

Initial Dose (Day 1 or After Large Water Change):
5mL per 40L

Daily or Ongoing Dose:
5mL per 200L

For spot treatment of algae, dose directly onto affected areas using a syringe (with filtration turned off temporarily).

For maximum benefit, use alongside a comprehensive fertiliser program such as Seachem Flourish and appropriate macro nutrients.

For stronger growth, improved algae control, and enhanced aquascape performance, Seachem Flourish Excel 250mL is one of the most powerful tools in modern planted aquariums.