Aquatic Plant Central - View Single Post - Green Dust Algae: What is it and how to control it?

cS · 08-13-2004, 12:04 PM

Green dust algae infests my high light 29G. In this same tank, there are no other noticeable algae present. The algae appears to be light loving; but short of reducing lighting levels and/or through an UV sterilizer, what else can I do to curb its growth on the glass walls?

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Plant growth is excellent: no deficiency and/or toxicity that I am aware of. Pearling occurs ~4 hours after the lights are on. I don't test for any parameters, but the following is my weekly fertilization regiment.

Pressurized CO2 at 1.5 bps, with external reactor powered by Rena Filstar XP3 canister filter.

CALCIUM/MAGNESIUM
3-6 dGH from CaCO3 & MgSO4.7H2O (0 dGH from tap water)

NITROGEN
32.57 ppm NO3/week via KNO3

PHOSPHORUS
1.86 ppm PO4/week via KH2PO4

MICRONUTRIENTS
1/64 tsp Plantex CSM+B 2x/week
1/64 tsp Sequestrene 330 (10% FeDTPA) 1x/week

Moderate fish load with feedings every other day of live grindal worms, flakes, or frozen bloodworms...depending on my mood for the day.

That comes out to be ~4.65 ppm NO3 per day. That's the minimum amount required (in this tank) to keep the leaves of Micranthemum umbrosum large and robust. Aside from being a phenomenally attractive plant, it is quite useful in the determination of the nitrogen needs in my tank.

Please advise. Thank you.

08-13-2004, 12:04 PM	#1 (permalink)
cS Senior Member Join Date: Jan 2004 Posts: 426 iTrader Ratings: 0 Plant Points: 3600	Green Dust Algae: What is it and how to control it? Green dust algae infests my high light 29G. In this same tank, there are no other noticeable algae present. The algae appears to be light loving; but short of reducing lighting levels and/or through an UV sterilizer, what else can I do to curb its growth on the glass walls? --- Plant growth is excellent: no deficiency and/or toxicity that I am aware of. Pearling occurs ~4 hours after the lights are on. I don't test for any parameters, but the following is my weekly fertilization regiment. Pressurized CO2 at 1.5 bps, with external reactor powered by Rena Filstar XP3 canister filter. CALCIUM/MAGNESIUM 3-6 dGH from CaCO3 & MgSO4.7H2O (0 dGH from tap water) NITROGEN 32.57 ppm NO3/week via KNO3 PHOSPHORUS 1.86 ppm PO4/week via KH2PO4 MICRONUTRIENTS 1/64 tsp Plantex CSM+B 2x/week 1/64 tsp Sequestrene 330 (10% FeDTPA) 1x/week Moderate fish load with feedings every other day of live grindal worms, flakes, or frozen bloodworms...depending on my mood for the day. That comes out to be ~4.65 ppm NO3 per day. That's the minimum amount required (in this tank) to keep the leaves of Micranthemum umbrosum large and robust. Aside from being a phenomenally attractive plant, it is quite useful in the determination of the nitrogen needs in my tank. Please advise. Thank you.