Once again, I need your help with blue-green algae, or cynobacteria. I have had a severe infection since summer. I vacuum out what I can, wipe what I can off of the glass, clip away dead and infected leaves. I do a 50% water change weekly. Although I missed last week (first missed week in months) and this week my tank is severe again. A few weeks ago, I did a week long black out which seemed help a great deal.
I have a 125 gallon tank, 384 watts of light with 1/2 x8 hrs and full x4 hrs per day, two Rena XP3 cannister filters, two additional small power heads, UV
light filter with small water pump, community fish, sword plants, annubis, crypts, some sagittaria, and a few freshwater clams.
Here are my current chemistry levels and dosing:
Boost: 1.2 mL upon water change
CaCO3: 7.5 upon water change
Excel: 30 mL
StressZyme: 30-60 mL upon gravel disruption
API Water Conditioner: 60 mL with water change
Following are every other day (5 mL = 1 oz) and are dry ferts:
KNO3: 1.2 mL
KSO4: 10.0 mL
Trace: 2.5 mL
: 1.2 mL
My test kits are API and I have tested my NO3
and PO3 kits with SeaChem and they are consistent with each other. Everyone says my NO3
ought to be much, much lower with the low dosing, but no one seems to know.
What do I do now??? HELP!
I have read about treating a tank with Eryrhtromycin antibiotic, but have not wanted to chemical or medication treat, if not recommended. But I am running out of options.
Recently one advice was to treat with Excel at 5 times the dose for blue-green algae for 2 or three weeks. I can try that. Should I do another black out with it? Am I getting to antibiotic treatments? HELP!!!
I also had a shipment of fish from liveaquaria.com recently and most all have died soon after arriving, but not other fish deaths. Fish overall look good, although one has an injury healing on his back/head for some time.
Thank you all for your time and advice.