Clarification on GSA - The Planted Tank Forum
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post #1 of 11 (permalink) Old 02-17-2017, 12:29 PM Thread Starter
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Clarification on GSA

Hi there, new member and looking forward to getting more involved here.

I was just hoping for a quick confirmation that this algae is indeed GSA.

I have looked up possible ways to rid my tank of this stuff, but hesitant to do a black out as i am currently trying to grow a new monte carlo carpet.

Someone suggeates to turn off the filter and spot treat with peroxide. Thoughts?

Tank details:
75gallon
Eheim pro 4 - 600
Eheim surface skimmer
Current usa pro plus LED - 7 hours a day
Fluval CO2 - 1bps / 6 hours a day
Fluval heater
Glass hood
Dose seachem excel and potassium every other day
No carbon in filter
Susbatrate:
1st layer: 2 cm pre substrate sand
2nd layer: fluval plant stratum
3rd layer: flourite black sand

Stock: 18 amano shrimp, 30 cardinal tetras, 7 rummy nose tetra, 1 male/1 female double red apistos, 1 clown pleco.
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post #2 of 11 (permalink) Old 02-17-2017, 01:12 PM
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Pretty sure that is not GSA, but instead is Clado. Erythromycin seems to work best in my opinion.
There should be a thread in the algae section outlining the correct dosing
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post #3 of 11 (permalink) Old 02-17-2017, 01:40 PM
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Quote:
Originally Posted by Immortal1 View Post
Pretty sure that is not GSA, but instead is Clado. Erythromycin seems to work best in my opinion.
There should be a thread in the algae section outlining the correct dosing
Do you mean Cyano? Looks like cyanobacteria to me. +1 on the Erythromycin

92% of all statistics are made up on the spot.
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post #4 of 11 (permalink) Old 02-17-2017, 01:57 PM Thread Starter
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Great! Yes cyano looks like the best fit. Is that product that you suggested safe for plants/invertebrates/fish?
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post #5 of 11 (permalink) Old 02-17-2017, 02:37 PM
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Yes, I meant to say cyano - too early in the morning lol.
@Beefy Fish - yes the Erythromycin is safe for plants / fish. Will check on invertebrates but I am pretty sure it is safe for them as well.
I have used this algae removal process on both of my tanks. Fortunately for me, I have only had to do the process once on each tank - cyanobacteria has never really returned to either tank (ocassionally see some along substraight edge on front glass)
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post #6 of 11 (permalink) Old 02-17-2017, 03:42 PM
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that is cyano / BGA

gsa is 'green spot algae' and looks exactly like... green spots...
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post #7 of 11 (permalink) Old 02-17-2017, 04:57 PM
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antibiotics are suggested for cyano (blue/green "algae") because it is in fact not an algae but bacteria.

Rich's Fishes
Curator of an ever growing fishroom that currently houses 17 tanks(72 bowfront, 2x55's, 2x29's, 2x20 highs, 20 long, 30 long, 38, 7x10's) many of which are planted; and a 55 gallon African Cichlid tank at work along with a few empty tanks here and there to be set up eventually!.
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post #8 of 11 (permalink) Old 02-17-2017, 05:18 PM
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Took forever to find this again...

Day 1.
Add 2.5 mg/L erythromycin. If you have a protein
skimmer, turn it off. I believe it will inactive a lot of the
antibiotic through coprecipitation with protein. It will,
however, be very usefull later.

Day 2.
Add 2.5 mg/L erythromycin.

Day 3.
Now you should see a lot of dead blue-green bacteria
floating around in the tank. Increase filtration (a second
mechanical filter if possible) to get rid of it. If you have a
protein skimmer, turn it on. The critical thing now is to get
rid of as much protein (dead bacteria) as possible to avoid a
peak of ammonia.

Day 4.
Most blue-green bacteria should be dead by now. Try to
clean out as much as possible of the dead stuff. I use a jet
stream of water from the outlet of a canister filter to remove
it from plants and decorations. Combined with the second
mechanical filter, this works fine for me. Let the filter work
for a couple of hours then make a 50% water change. Add 2.5
mg/L erythromycin.

Day 5-7.
Wash the mechanical filter at least once a day. Keep
check on ammonia and nitrite but do not change any water
unless absolutely necessary. The extra filter can be removed
as soon as the water clears up.

Day 8.
Make a 30% water change. Add 1 mg/L erythromycin.

From now on, resume your normal maintenance.
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post #9 of 11 (permalink) Old 02-17-2017, 07:10 PM Thread Starter
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Perfect! Thank you for all the information everyone. Imortal1, i will be taking your advice and follow those steps. Now just have to find and purchase that stuff.

Thank you again
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post #10 of 11 (permalink) Old 02-17-2017, 08:14 PM
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I eradicated the BGA in my tank with H2O2. Not only was it a lot cheaper than erythromycin, it was satisfying. You get to watch it sizzle and die while you're applying it. I suffered no losses.
I don't remember the exact dosage, I did a search on hear and looked at different opinions as to what was a safe level for dosing the entire tank. I went with 1/2 of that level as a safety factor. Turned off circulation and applied the dosage directly to the nasty stuff with a syringe. It starts sizzling right away and then turns pink and breaks up. It dissipates quite quickly so you can wait a day and repeat as needed.
I chose this method as it was a fraction of the cost and I thought my beneficial bacteria was safer.
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post #11 of 11 (permalink) Old 02-17-2017, 11:28 PM Thread Starter
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Decided to try h202 before ordering the erythromycin online.

Couple syringes of h202 and it immediately went to work. Manual removal of some after the dose, it just came up like nothing.
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