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Flourish Excel

Physical Product · Aquariums & fishkeeping · 22 mentions · 2 subreddits · discussed in r/PlantedTank, r/Aquariums

Reddit take

Not enough linked mention summaries yet; the source excerpts below are the evidence.

Pros

  • I did get a big bout of hair algae and maybe panicked and hit it with Flourish Excel. It took care of it
  • Flourish Excel would be a middle option.
  • In place of your missing co2 use flourish excel every other day
  • Just Seachem flourish and flourish excel once a week each.
  • I ran across some video recommending flourish excel to battle hair algae along with boosting fertilizer. I tried it and shit you not it is gone now, not even a week later. Apparently algae hates the stuff.

Cons

  • I'm using "Flourish Excel", blindly trusted the man at the local fish store when he said that's all I need. Your comment spurred me to look it up, and it sounds like it would kill shrimp if I put them in.
  • Flourish Excel isn't a fertilizer. It's an algicide.
  • Excel is a gimmick IMO. Liquid carbon is not equivalent to co2.
  • Also any good all in one fertiliser recommendations would be helpful as I’m trying to switch from flourish and flourish excel!
  • I’ve been dosing flourish excel (in the past it’s done wonders for battling stubborn staghorn algae) but it hasn’t done much this time around.

Sentiment

13 positive (59%) · 5 mixed (23%) · 4 negative (18%)

Trust + time weighted score: +41% · raw score 41%

What redditors said (10 of 22)

I'm using "Flourish Excel", blindly trusted the man at the local fish store when he said that's all I need. Your comment spurred me to look it up, and it sounds like it would kill shrimp if I put them in.
mixed · u/a****d · r/PlantedTank · comment · Jul 29, 2025 · open on Reddit ↗
I did get a big bout of hair algae and maybe panicked and hit it with Flourish Excel. It took care of it
positive · u/s****0 · r/PlantedTank · Dec 31, 2025 · open on Reddit ↗
Flourish Excel would be a middle option.
positive · u/P****5 · r/PlantedTank · comment · Dec 30, 2025 · open on Reddit ↗
Flourish Excel isn't a fertilizer. It's an algicide.
negative · u/b****e · r/PlantedTank · comment · Dec 29, 2025 · open on Reddit ↗
Excel is a gimmick IMO. Liquid carbon is not equivalent to co2.
negative · u/F****y · r/PlantedTank · comment · Dec 19, 2025 · open on Reddit ↗
In place of your missing co2 use flourish excel every other day
positive · u/b****m · r/PlantedTank · comment · Dec 19, 2025 · open on Reddit ↗
Just Seachem flourish and flourish excel once a week each.
positive · u/S****f · r/PlantedTank · comment · Nov 27, 2025 · open on Reddit ↗
I ran across some video recommending flourish excel to battle hair algae along with boosting fertilizer. I tried it and shit you not it is gone now, not even a week later. Apparently algae hates the stuff.
positive · u/s****p · r/PlantedTank · comment · Nov 21, 2025 · open on Reddit ↗
I used this method and Flourish Excel (Cautiously with dosage) - Suplimented food for shrimp during dosage as it wipes out a lot of biofilm when attacking hair algae. ... everyone survived and hair algae subsided. Worked for me.
positive · u/m****h · r/PlantedTank · comment · Nov 21, 2025 · open on Reddit ↗
You can kill it by turning off all the filters and dosing an appropriate amount of flourish excel or hydrogen peroxide with a small syringe directly to the affected areas.
positive · u/Y****9 · r/PlantedTank · comment · Nov 18, 2025 · open on Reddit ↗

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