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Thread: Brown or red algae?
02-23-2013, 10:49 PM #1
Brown or red algae?
Seems my tank is being taken over by a brownish algae that grows on the plants only, the more I clean it the more it seems to spread around the tank and grow faster. It started 2 month ago with only spots on the crypts and it is now on every plants but nowhere else (my guess would be the nerites are too heavy for the plants and don't eat from them).
I have 2 fluval moss ball for phosphate control already in the tank.
I am planing on ordering some
-chemi-pure Elite (for phosphate and silicates control)
-flourish Excell as a CO2 addition.
But really, I don't know, here is a picture as you can see makes long brown fringes.
Please, tell me what you guys think.
02-24-2013, 12:52 AM #2
They look like diatoms to me, although the picture aren't too big.
02-24-2013, 12:58 AM #3
Diatoms don't grow just on plants and never are more than a thin film that is easily removed. Your plan seems good BUT check your nitrates - they are most likely high. Larger water changes more often will be your best solution long term. If removal cause more growth, consider a good UV sterilizer; if these fail, an algae scrubber will work BUT you'll then have to start dose nitrates as well as normal ferts in order to properly feed the plants once a scrubber is operating.
Last edited by Cermet; 02-24-2013 at 01:02 AM.
02-24-2013, 06:53 PM #4
@Cermet: Would you lean toward red algae then? or something else maybe?
I am asking because of your suggestion on a UV sterilizer.
Yesterday my Nitrates were between 5 and 10 ppm as usual, amm 0, Nitrites 0 as usual the pH though was a little higher 8 instead of 7.8. Thinking it might be the consequence of phosphate and silicates ,just assumption of course will be happy to know what's your opinion on this.
I was due for maintenance this morning so I took a sample of it, in a clear cup.
Here are the picsalgae6.jpg
02-24-2013, 09:20 PM #5
If your nitrates are 5 - 10 ppm, then very likely the phosphates are above 2 ppm; that will feed any algae. Large water changes (near 100%) after stirring the substrate as much and deeply as possible. This might lower them enough (the phosphates - consider a kit for that parameter) - then do this twice a week to maintain nitrates under 5 ppm. Vacuum any all uneaten food. Use a phosphate absorber. All these I have tried with limited success but they do work; especially if the plants start removing any remaining nutrients. A UV sterilizer can help but isn't the sole solution. As I added, an algae scrubber will kill off the algae but thean you have to watch the nitrates carefully (and add when nec.) since they can drop down below 1 ppm!
Not sure which algae but the red looks likely.
02-25-2013, 10:40 AM #6
Here is the site Lady Hobbs has for Alage types/photo's:
Does not look like red alage but either Cladophora algae or fuzz algae.
Last edited by Cermet; 02-25-2013 at 10:42 AM.