Holy Bacteria Bloom Batman!!

[I_Machine]

First off, "Hi all!" got lots of good help here so far, but had to tell this one...

2 month-old 50 [acronym:2d22a9ee59="Gallon"]gal[/acronym:2d22a9ee59], everything was going fine, just had a nice diatom algae bloom, so I decided it was time for some Ottos. 2 days later, after they cleaned most the algae out of the tank (efficient little guys!) I'm in the middle of a HUGE bacteria bloom, even worse than when the tank cycled the first time. So bad, in fact, it's clogging my filter! Luckily I caught it and turned down the flow before it overflowed itself. Could the Ottos (who have been described as "poop factories" by some here) or the ProperPH 7.0 I added triggered the bloom? [acronym:2d22a9ee59="power head or Measure of the concentration of hydrogen ions, depending on context"]PH[/acronym:2d22a9ee59] was 7.8 before, so I figured I'd make the tetras and rasbora more comfy.

[FMZ]

If its the white bloom, you are overfeeding your fishies. If its green bloom, hope somebody else can chip in as I dont know much about the green bloom

[Strikh]

I can't help much (at all), as I haven't had to battle this yet...
But I did want to interject that I haven't found Ottos to be "poop factories". Now Plecos, well, let's just say mine trails 3 foot long poo at some times...

[grimlock3000]

Otos only create waste by eating stuff that is already in the tank. Same thing with Plecos. Any fish can be poop factories if you overfeed

[I_Machine]

It cleared up a bit this morning, could've been salts precipitated out of the water due to the ProperPH (San Diego water is a bit hard), but two days later?

[Menagerie]

[center:0691618d9a] Welcome to AA, I_Machine!! [/center:0691618d9a]
For the most part, no one on this site will recommend using chemicals to regulate the pH of the water. There are natural ways to do it, including adding driftwood and/or peat to your tank/filter.
I'm not sure why the bloom came on suddenly, or why it cleared up already. I do have some Qs that may help solve this mystery:
-How often do you water change and gravel vac?
-When you do water changes, how much water do you remove?
-What are the water parameters (ammonia, nitrites and especially nitrates, which are basically plant fertilizers)?
-Does the food you feed contain phosphates?

[I_Machine]

Weekly 20% changes, don't have a vac yet (saving up for a python ) so I stir up part of the gravel and suck it up with the siphon.

Ammonia's been zero since cycling, and my strips said the fish should be dropping dead from the nitrites, so I took a sample to the [acronym:5b428e8d54="Local Fish Store"]lfs[/acronym:5b428e8d54] to double-check. Nitrates were a bit high (40 [acronym:5b428e8d54="Parts per Million"]ppm[/acronym:5b428e8d54]) but nitrites were fine. I expected the nitrates to be a bit high, considering the algae (I really like my Ottos). All fish seem fine and lively (it's like the Rasbora 500 during the day ) Food is TetraMin, which does contain some phosphates.

[I_Machine]

I'm pretty sure it's just precipitated salts.

I touched the filter media, and it started dumping cloudy water back into the tank. So I took out 10 gals, removed the filter cartridges, rinsed them in the buckets of tank water, and hopefully it'll clear up over time. This water is quite hard, like around 200ppm [acronym:09e7c40ec3="General Hardness"]GH[/acronym:09e7c40ec3], and it leaves a white crust around the open parts of the cover.

[Menagerie]

I touched the filter media, and it started dumping cloudy water back into the tank.

EW
Nitrates are normal--higher than 40ppm is not good.

[krap101]

you should use tetra or stress coat. both of them remove harness... it reallly helps