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Discussion Starter · #1 ·
Hi all,

I had a big outbreak of algae (brush, BBA) with a light change (!), so now in a 3 day blackout. Will also get some more ottos and I think I'll also have to get some SAE for the BBA (I'm not a fan, but they do a job...).

Anyway, here's my schedule (with help from Chuck's calc).... Any comments on it from experience please let me know - I'm determined to crack this one once and for all....

In particular:
- does the make up look ok for micros?
- is the calculation correct for PO4 from Fleet Enema?
- I'm at 2.3w/us g. From a EI pov, is this only defined at medium light? Is this regime over the top for this level of light?
- Do I go straight out with the fert dosing after the blackout (with water change beforehand), or should I run fert free for a while?


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Tank volume = 170l = 37.4 UK g = 44.9 g

TARGET LEVELS
Nutrient Level (ppm)
Magnesium 5-10
Nitrate 5
Potassium 20
Phosphate 1

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Bottle 1: K + Mg

MAGNESIUM – from Magnesium Sulphate
With 1000ml water:
100g MgSO4.7H2O
1ml gives 0.06ppm Mg
Add 120ml which gives 7.2ppm Mg

POTASSIUM – from Potassium Sulphate K2SO4
With 1000ml water:
45g K2SO4
1ml gives 0.12ppm K
Add 120ml which gives 14.4ppm K

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Bottle 2: Macro Nutrients

NITRATE – from Potassium Nitrate KNO3
With 1000ml water
28g KNO3
1ml gives 0.1ppm NO3
Add 10ml which gives 1ppm NO3

POTASSIUM – from Potassium Nitrate KNO3
With 1000ml water
28g KNO3
1ml gives 0.06ppm K
Add 10ml which gives 0.6ppm K

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Bottle 3 – Fleet Enema

PHOSPHATE – pure Fleet Enema

Fleet contains 131.36 mg PO4 per ml of solution

1ppm = (1 mg/liter) x (44.9 gals x 3.77) = 169 mg PO4 needed.
(169 mg)/(131.36 mg/ml) = 1.29 ml enema to get 1 ppm PO4 in 44.9 US gallons.

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Bottle 4 - Micro Nutrients

With 250ml water
10g Chelated Trace Elements
4g Chelated Fe
250ml water

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Dosing Regime:

Sunday 50% water change. Then macros, Phosphate, Potassium
& Magnesium
Monday Traces
Tuesday Macros (if required – monitor NO3) & Phosphate
Wednesday Traces
Thursday Macros (if required – monitor NO3) & Phosphate
Friday Traces
Saturday Nothing!


Thanks in advance.:bounce:
 

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CO2, CO2 and CO2.
It's 40-45% of the plant's biomass, you have light, you have nutrients and you have BBA.
What's left?


Regards,

Tom Barr
 

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Discussion Starter · #3 ·
Hi Tom,

Sorry, missed the CO2 part of my post. I'm running a pressurised system, 3-4 bubbles/sec. From the pH / KH calc, CO2 is at ~35ppm. No effect on fish, so could up it a bit more, but already seems at the top end of the scale. Do you advise trying higher CO2?

As I am running high CO2 I assumed a nutrient difficency. Or could I still do with more light in this system?

Thanks.
 

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The general rule with upping Co2 is to increase it to the point where the fish are gasping for breath and then back it off a tad. That is what I have heard rehashed time and time again, but it seems to work.
 

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Stable good consistent CO2 will go a very long way to solving 95% of folks issues.

Good current, some surface movement(you can add more cO2 to account for any losses there), will also help mix the gas well and provide some O2 for the fish during the night and early part of the day and this allows you better conditions for the fish and more wiggle room adding more CO2.
Reducing the light also helps most algae issues and reduces CO2 demand.

Try the Drop checker.

Regards,
Tom Barr
 
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