weileong

$100 is better than "passing" so see what I meant by "easily" lol.

Why don't you go buy the hanna calibration solution. 500ml per bottle selling for around $25, I think can last you quite a long time. No worries of the need to prepare it or prepare wrongly.

Dun have set la, that time got set you dun wanna buy, now dun have you wanna buy? Got buy the "set" from victron. Very attractive price.

Got a 1 months old Sylvania AquaArc 150W DE MH bulb for sale. Got myself a 20,000K saki so letting go of this one. You can see a brief review of it in the following URL. http://www.advancedaquarist.com/issues/nov2002/feature2.htm As quoted from the article "The color appears a crisp white with little green or blue coloration whatsoever and is very pleasing to the eye." Asking for $40.

Coralife Deep-Six hydrometer for sale. Asking for $8. Selling cos got myself a refractometer and no more need for it.

don't tell me bought from CF? Seriously I dare not buy unless I know they are eating. If not wait kanna from AT

is that a cleaner wrasse ? How long has it been in your tank and is it eating? Oh bought from where

very nice lei!

I forgot cos just now rushing to go take my IPPT Aiya end up fail Cos keep losing my balance on the threadmill and the muscles used are different from running on the track. Errm... expensive say like 4 digits? Another reason why they normally have pH 4,7 for two point calibration and not 9 or 10 is because pH 9 or 10 solution will absorb CO2 from the atmospher air and will degrade quickly after that. So it's no longer interesting after you know the reason right? I also made a mistake, it's the concentration hydrogen ions vs mV generated in the pH electrode and not mV/pH curve. The mV/pH curve is a straight line. Usually pH 7 set the zero points (0 mV) pH 4 or 9 sets the slope of the straight line (-120 mV for pH4 and 120mV for pH7). This vary a bit and depends on the made of the electrode You could still obtain pH 9 solution and use it to verify the reading at pH 9. Plot two points with the other points at pH 7 then corelate the actual reading from the graph. Another point of interest is that the pH does vary a little depending on the temp so if your pH meter do not have temperature compenstation then you'll need to ensure during calibration the buffer solution are at the same temp as the water in the tank. It's quite troublesome if you're really going for that 0.xx accuracy in your pH reading which I think we do not need such precision for our reef tank.

The more expensive pH meters allows 3 points calibration at either 4,7,10 or 4,7,9. Some even offer customed calibration value. The cheaper ones only 2 points and either 4,7 or 7,9 or 7,10. Seems like we've no choice but to extrapolate. The mV/pH curve is in log form so you can already guess the accuracy especially if you do not calibrate on a frequent basis. If you don't like that then by all means pay for the higher ends lab used type that offers 3 decimal place precision.

can explain more on the "good husbandry skills" ?

ryz, pure white LED are very $$$.

siao liao, we know who's the champion here

Maybe $12, forgot the price already. I use temperature compenstation chart and the SG reading on the coralife to adjust to the salinity. Was surprised it was that close heheh.

I can't wait to see your tank you know BTW I also got the refractometer already. My salinity was 34.8ppt SG 1.026 which is very close to the 35.0ppt which I was setting with $6 coralife swining arm SG meter.

I thought you said the same for that tang and goby... okie let's see if you can tahan this time. Endure endure!!!

bro, you can tahan that long? Heheheheh maybe suddenly see you post the new toy next week

That's why I always leave abt 1-2" before the DSB then let the turbo snails do their job there.

Gotta thanks bro Roidan for telling me those blade type sold in LFS might scratch the glass so suddenly this idea came to me

Total cost maybe 50 cents, time: 5 mins, maybe lesser. Old phone card also can Or door access card from hotel in Genting also can use

found a old credit card then insert in. Done Simple enuff eh? Now the back of my tank super clean. Now my hands are totally dry. Fishes no need to smell my arm pit.

Trying to scrub algae today but cannot reach the whole tank so make this super simple DIY. Cut a PVC pipe and saw a small slot thru it.

ah... it's bro batman's light. How's his new 4ft tank coming along?

maybe I try to make something to hold the credit card then use it to clean the algae can liao. Not sure can modify those blade ones to hold the credit cards or not.

algae magnet is no good for those green spot algae. Use credit card the hands need to go into water. Heng you tell me will scratch the glass