diy aquaponics system | Fixing Eheim 2217 Rattle Noise

diy aquaponics system

After years in service (15 plus years), my trusty Eheim 2217 finally acting up. For the pass couple of days it produced loud rattle noise. I dismantle the filter, especially the impeller area and found that the shaft rubber cap was loosen due to wear and tear as well as age. This cause the impeller to miss align and after thousand or maybe million rotation, the shaft hole is giving up and become ellipse. This is where the noise coming from. The impeller was hitting the wall during rotation.

Picture of the shaft where one of the rubber cap is loose.

Impeller picture where the hole become ellipse due to continuous friction with the shaft.

Zoom in on the hole, colored in red for easy viewing.

So I replace the whole assembly, bought new impeller and shaft which cost me total S$37 (S$29 + S$8) and it silent like brand new. My advice next time when you service your filter and feel that the shaft is loose, change it.

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diy aquaponics syphon | DIY LED light set for ADA mini S

diy aquaponics syphon

Another DIY LED light for my ADA cube garden mini S tank.

Material:
1. 62x5cm aluminum plate, used as a heat sink (US$10)
2. CREE XR-E Q5 LED (US$3.95x3 = US$11.85)
spec:
- 3.7V typical driving voltage
- Manufacturer Rated 228 Lumens at 1000mA input current:350mA: 107~114lm
700mA: 171.2~182.4lm
1000mA: 214 ~ 228lm
3. 900mA 10W Constant Curent Source LED (US$5.61)
Driverspec:
- 10 watt high power LED driver

- Input voltage: AC 85~265V

- Output voltage: DC 9~11V
- Output current: 900mA4.
Miscelaneous items: thermal paste, screw and bolt, cable and small container

Top view of the vertical stand. The screw hole is used to adjust the LED height.

Side view

Top view of the horisontal part, this is where the LED be. I will be using 3x3W CREE XR-E Q5 LED.

Side view

Combine both vertical and horisontal.

Electrical wiring

Light set hand on the cube garden. The height of the LED is adjustable. Below photo is where it set to maximum height.

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diy aquaponics book | Photography Light

diy aquaponics book

I have a photography tip.

Buy old slide projectors whenever you see them in a garage sale or whatever.

They are a really good source of light.

And of a colour, that if you put a slide of a nice day in them, they project something that looks like a nice day.

So...

Natural light

Naturalish.

And really bright.

Really less bright, if you drop in a filter or a paper towel, or some coloured cellophane or whatever else you might want to use. They have a purpose built slot that was designed to take a small square of something, and shine its qualities onto something else.

Brilliant!

Or less brilliant.

Totally controllable!

Perfect!

$4 !

$2 if you haggle.

Dont haggle.

$4 is a good price.

They even have a focus dial.

Which is nice.

I guess.




120 Things in 20 years teaches that photography feels better if you give the slide projector guy the extra $2. It was the large flat screen TV of the 50s. He spent a lot on it.

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