Hi bro.

Sure can shere...no prob. ok, my tank is about 55 liter, using Eiheim 2211 filter, my lighting is aquazonic 24w x 4 and yup my co2 is 2bps . Also i do 30% wc 2x a week, wed and sat.

Hi Guys,

This is useful site for calculate tank volume

http://www.firsttankguide.net/calculator.php

I'm running 2 unit of T8, each 18watts over my 25 gallon 2 feet tank. Currently thinking of adding another one...

I don't have a hood, don't want one, don't need one. Cause I'm using DIY fans to lower my tank temperature for my RCS. And also because I'm using normal T8 lightings with the frame one, so its actually a bit more longer then my tank, if got hood need to modify my lightings . I attached a picture...


Attached thumbnail(s)

high recommended you to DIY lighting set with T5 tubings. smaller in size and release lesser heat compare with T8.

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Added on September 23, 2010, 8:07 pmdo you have any algae problem such BBA?

This post has been edited by fongzai92: Sep 23 2010, 08:07 PM

hi, anybody have extra RCS for sale? i'm looking for cheap cheap one to test. If got free one lagi best.

can any1 recommend me lighting
right now im using T8 18w only
i want to bring up total wattage to around 40w
and what to ask the hardware shop for
should i stick to T8 and go for two?
or should i try other etc T5 or pl lighting?

But T5 tubes are much more expensive as compared with T8 lightings, T8 18 watts is RM7.90 but for T5 its about RM20 for 20watts, last time I compared la... Now I not so sure, anyone got updated price???

Hi,
I got 2 unit of 10w LED. I also got one old computer PSU which generate 12v of current. I planing to setup DIY lighting for my nano tank.

Any suggestion or schematic diagram for me ?

but the heat release by T8 is much higher than T5.

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Added on September 24, 2010, 2:08 pmif i were you i will go for T5 since T5 as easy as plug and play.

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Added on September 24, 2010, 2:09 pmwhats the spectrum of that LED ? i think the normal cheap cheap for pc modding 1 not strong enough for aquarium tank right ?
correct me if im wrong.

This post has been edited by fongzai92: Sep 24 2010, 02:09 PM

This is the spec. I 'd tested. It is super bright.
http://www.dealextreme.com/details.dx/sku.5876

6500k. no problem where u buy it ?

Online. The problem now is one of the LED is not switch on 100% when i put it in parallel circuit.
I think my old computer PSU not enough power.

In parallel it becomes a current divider, in series it's a voltage divider.

make sure the PSU has enought current output to drive the LED in parallel.

to calculate current output, P=VI. Power in watt, V in voltage and I in amps. so, I=P/V

Eg, I=400/12 =33.33 Amps..

U might wanna be careful with the circuitry. A 3 watt led has a driving current of 700mA= 0.7 amps. ur PSU has way more power to run leds make sure u have properly designed the circuit with adequate resistors to limit the current and voltage to avoid frying the LED.

This post has been edited by moe81: Sep 24 2010, 05:28 PM

how much u bought then ?

33amps ! , how could I draw that current?
My PSU is 12v but I don't know how much is the current as I don't have any tool to measure it.

This is my circuit design.


How could I limit the current with resistors? I have 1.5 ohn and 5.2 ohn spare resistors. Can I use it ?

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Added on September 24, 2010, 6:08 pmAbout 10USD each. including delivery charge.

This post has been edited by Superdude: Sep 24 2010, 06:08 PM

Nice, since u have a circuit up, it'll be easier to troubleshoot.. what's the power rating on ur PSU? how many watt? from that power u can find the current output..

also, if it's possible. state the LED, driving curent and forward voltage.. if u get it from ebay, check the isting. it muct be stated there...

huh... why not buy from local leh ?

LED Data sheet.




My PSU Spec, I am using the +12v cable. it is 18 amps.


what should I design the circuit base on this spec?

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Added on September 24, 2010, 10:04 pmI don't know where can I buy those high power LED in KL. Do you have any suggestion?

This post has been edited by Superdude: Sep 24 2010, 10:04 PM

yay my tank 2 months old already. Bought some cheap CRS back, rm10.50 ea

specs for ur LED:

Power: 10W
Voltage: 10V
Current, I= P/V = 1 Amp

If u have connected the two leds and the PSU parallel to each other, the voltage drop across all component will be 12V. that's bad. prolonged operation in that voltage may compromise ur leds life span. or might just fry it even sooner. so, we need to calculate a equivalent resistor to limit the voltage to 10V max across each led.

For the PSU, if u're using the 12 volt cable only. with the 18A current, u can drive any component up to (P=VxI) (12x18), 216 W max. but u're only gonna drive 2 10W led. that's only 20W. so, again we must limit the current too. from ur led spec the current goin thru each LED must not be more than 1 Amp as opposed 18 Amps..

let me calculate and put up a new circuit for u. so u can drive ur leds safely.. but i'm not sure how damage u have done to ur leds already..