Phantom

There is someone trying to sell some on facebook for $3 each in Christchurch. https://www.facebook.com/groups/NewZeal ... 759598770/

Corner Ilam and Clyde roads. http://goo.gl/maps/DBSRx The shop in green in that link.

John at Organism often has them.

I've got a tank I want to bring into work. Haven't worked up the guts to ask if I can though.

Did you get them from the place I mentioned in my thread? Have you protected them from the water / water vapor?

Rodney is the user "pauljones" on trademe.

Welcome What about those jellyfish or did you not get them in the end?

I used the filter, it provided the air exchange. I put carbon, phosguard and purigen in it. I used a small aqua one pump in the tank. You can see it on my thread. Did a 10% water change weekly. Had it running with a couple of soft corals, shrimp and fish for about 3 months. I did make a guard out of polycarbonate that prevented evaporation near the LEDs. Also served to prevent salt build up around them. Mounted my additional LEDs on small heatsinks, secured onto 2 metal strips that stretched between the sides of the raised section.

Local company, I mention them in the thread. I also got some from the US, but they weren't nearly as bright.

Agreed. Didn't take me long to move onto a 450L marine and ditch the nano. I only did the fluval edge while I was waiting for my insurance payout.

I did exactly that. Started off with a fluval edge. I got 2 x MR11 cool white LED lights for it, but also made my own LED lighting to complement them. I have a thread on here with a bit of info. viewtopic.php?f=5&t=53458

Or I could just do it for everyone Done

Tried Element 14 and RS Components? They're the 2 main suppliers of electronic parts within NZ.

I don't have a controller, I'm making my own like Saxsena did. I've seen quite a few pH probes that output in a serial format rather than just being a x mV/pH probe. Saxsena, did you use one of these basic probes or one with some logic built in?

And are they easy enough to rig up to custom gear? I've seen those, but thought they were only really suitable for their own branded controllers. In saying that, it should be reasonably trivial to amp up the output and work it out, but I'd prefer something that's a little less DIY in case I introduce inaccuracy without realising it.

I've started, meaning I have a raspberry pi for it, I've got it controlling relays on a bread board etc. I haven't got my sensors yet, seems the pH ones are all USD$300+ for anything half decent. I haven't taken it any further yet because I'm now working on LED lighting and I want to get that sorted. I'm setting up my lighting so that it would be easily controlled by my pi. I'm putting it on a marine tank and I'd like to have a bunch of other sensors as well. Things like PAR for lighting, salinity etc. Yes it will be in linux. I'll probably just do it using cron jobs and a bunch of cgi scripts on a webserver. I'll then probably make an API that uses these cgi scripts so I can make pretty apps to work with it from other devices (phone / PC's).

Nice one. I started doing one of these using a Raspberry Pi. What pH sensor did you end up using for this build and was it very expensive?

He just sent out a stock list he has available to him from his suppliers. Lets you pick whatever you want and he'll bring it in for you. Orders have to be in by the 20th though.

Nik knows his stuff as well. I've bought a few things from him now. Worth getting on his mailing list too. Last month when he did his restocking, he sent out the full availability list to everyone on it and you could reply back with what you wanted him to bring in for you. You had to commit to that purchase though.

Seems too cheap, but looks good!

... unless she gets the fibre installed into a more central room or closer to the TV. But yeah, ADSL isn't the problem with the streaming to the TV, fibre won't fix that current issue. EoP is good, I have several units here I use with clients. Just they're expensive compared to sorting out the wireless other ways. Jennifer, if you'd like to borrow some EoP units to try before you buy, I have some here you could use.

Yes. For example, from RapidLED you can get the following Violet options. http://www.rapidled.com/violet-uv-leds/ If you are mounting it well above the water, you'd want a lens on each LED that focuses the light down into the tank. Otherwise, you're just lighting the room and wasting it. Same principle as using reflectors on tubes to increase the light directed into the tank. The angle you want depends on the height above and how much water you want to cover with each LED. This is a good read: http://www.rapidled.com/led-university-1/ As is this (if you have the time and can get your head around it): http://www.advancedaquarist.com/2012/10/aafeature

Yes, it certainly would. Have you seen how much commercial LED units go for? Another thing to note is optics. If you plan to mount your fixture well above the water line, you'll want to use optics on each LED to direct the light into the tank rather than letting it scatter.

At those speeds above, fibre may make a difference. It really depends if you struggle to stream the content you want with your current connection (tested close to the wireless access point). Fibre starts at 30Mbps, so the bandwidth between you and the ISP will be 5x as much as your current connection. As far as I know, the antenna on those routers isn't removable. Are you able to check and see if your one can unscrew? If so, it would be pretty cheap to get a bigger one. Can you not move the router to somewhere more central? If not, I'd probably look to get a wireless bridge with a grunty antenna. That should be more like $75 and could sit behind your TV.

The wireless issue is signal strength, not your connection. If it works fine closer to the wireless access point then it's not your internet connection. Does your wireless access point use external antennas? If so, you can upgrade those to something better to help boost the signal. Otherwise, a new wireless access point with a higher output would be your only real option there.