Substrate Algae Problem

if it is lack of N causing cyano, this is one time i'd suggest EM as a first resort instead of a last resort. clear that up and start from scratch and see where that gets you. i'd hate to start a tank that already has problems only to find out more are coming and i've just limited how i can remove the first one.
 
If the tank isn't cycled then the cyano is the least of your worries. Have you checked ammonia/nitrite/nitrate? My guess is that with only one oto you haven't got much of anything going in that regards. If you plan on fish cycling the tank you should be prepared to stock slowly, do rigorous testing, and water changes to keep ammonia and nitrite at a minimum. On that note otos are a horrible fish to put through cycling...not that I believe any should.
 
Well the 1 oto is the only survivor of a filter breakdown/ aquarium drain, so he's been here a while. Also, we think we will start the whole tank over with new sand and water. Then, we will slowly add fish to cycle it. That should clear things up right?
 
Another thing to consider doing is use peroxide to treat the cyano. I just went through this in my 55, you can look it up on google and get a bunch of info. I used a syringe and spot treated totaling about 1mg/gallon. Worked absolutly awsomely, all my fish were fine, and maybe even enjoyed the added oxygen.
 
Well the 1 oto is the only survivor of a filter breakdown/ aquarium drain, so he's been here a while. Also, we think we will start the whole tank over with new sand and water. Then, we will slowly add fish to cycle it. That should clear things up right?

I'm not exactly fond of fish cycling, but if that is the only option then make sure you do it correctly.
 
I like the peroxide idea! I think I'll do that! Thanks for the tip canucksfan1 !
 
How often should I dose the peroxide? Every 24 hours?
 
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