Splitting or about to die?

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Hey all, this nennie is just over a year in my system. Bought him at a little bigger than a R2 coin. At biggest a few weeks ago was around 20cm diameter (see pics below)

Recently had a bad phos spike which caused green hair algae. I used h202 on 2 occasions (around 20ml 1st time and 200ml second time) on algae to knock it back.

All parameters except phos and nitrate remained stable:
Phos at worst was 0.3, nitrate 16
Readings now Are:
3b6e0f27db28d29f9f58f4c8a021280c.jpg


This is what nennie looked like into December:
3ae8448a1052095e023109ed5b342dc6.png


And the sad look it has had for the past couple of weeks:
42a03cd4a526326f6ec346cd868aebc5.jpg


So what do you think? Did I doom it with the h202 or is it a stress/ split thing?

Mouth gaping all along and nennie 2 is doing fine:
ccc154bdcd172cde918630eac1150ac0.jpg

(Been in system around 2 months now)

P.s. I did loose 2/3 cleaner shrimp around the h202 time. They were 14 months old.
 
Last edited:
Why would you add so much Hydrogen peroxide to your tank. You normally can clean life rock out of your system with peroxide. Algae caused by high nitrate and phosphates. Peroxide not a carbon source
 
What percentage of H2O2 did you use. Was the 200 mls that you added concentrate or dilute
 
Yeah it looks to be in bad shape. Any improvement since Monday?
 
That is a lot of peroxide to have put in your tank. Who told you to dose so much and to add it directly to the tank?
In future, rather let the algae die off slowly on its own. Killing it directly will be a short term problem and if you dont treat the source, it will grow back
 
Ye - sadly he started moving around today as well. All bad signs.

Hard lesson learnt.

Thanks guys
 
Sadly I lost this guy tonight.
Thanks all for the advice. Lesson learned.
 
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