There has been a lot of progress over the last few days.
Ammonia hit zero about a week ago but Nitrite was still up pretty high so we decided to wait it out. I gave up on the testing for a few days and then Thursday did a test and whalla - Nitrite is down to zero. Next test was Nitrate which was down to 6ppm - Yey, not only can we get fish in there, but we can also start moving some of the coral in.
Easier said than done! We have been trying to catch the fish out of our old tank for a few days now. So far, we have managed to catch the Tomato Clown, Leopard Wrasse and Lawnmower Blennie, with the 2 tangs still to come.
I started moving some of the rics over, initially placing some on the sand - man I do love the contrast the black sand gives to the colour of the rics, but then decided to move them up on to the rock work.
I also moved a couple of rhod's over and some duncans.
I am really going to enjoy this rock when time comes to start moving and putting in SPS - all the holes and texture make it so easy to place coral!
On the tank setup from, things are still a bit of a mess underneath as it progresses. I picked up a Tunze 3155 Ozmolator and 60L acrylic tank for ATO the other day and that quickly went in - I had planned on making my own ATO but got a good deal on this pair so thought what the heck.
I have also moved the heaters over to a solid state relay instead of being driven off the APC Switched PDU - the PDU has mechanical relays in it and after logging the on off events, I realised that there was a switching event on the heater circuits every 6 or so minutes and that the mechanical relays would soon wear out. So I knocked up a SSR circuit and added a second Arduino to the mix and made some software changes and now have the heaters being driven on a SSR - the added benefit is it also allows me to move the heaters off the UPS - the heaters are the single largest power consumer in the whole tank so moving the heaters off to mains power will massively extend the run time in the event of a power outage (it does not get that cold where I am and I would prefer to have a cooler tank that is circulating for a long time than a warm tank that is circulating for a very short time) .
The control side of the system has had a few updates both software and hardware wise. There is still the Raspberry PI main controller but there are now 3 arduino boards interfacing to it over USB / Serial. The main board is running all the Atlas Scientific probes on a Whiteboxes Tentacle Shield / Board. The board is running Temp, Salinity / Conductivity, ORP, Dissolved Oxygen and PH. I did a full calibration on all the sensors but I think the conductivity is reading a bit out so will have to do it again.
The sensors are all located in a little quad bracket that I 3d printed the other day.
The second arduino board is for the heater controller and any other general purpose IO I may need down the track. I have a couple of float switches I need to wire in which will be done on this board as well as a few solenoids etc for water changes still tho come.
The 3rd arduino board if dedicated to the dosing system. There are currently 4 channels running on it but I have enough IO on the arduino to wire in many more if needed.
I spent most of the day testing and fine tuning the dosing system, making sure all the math was right as well as getting the UI done.
The UI allows you to set how much you want to dose per day on a per pump basis, calibrate each pump, say how many times a day you would like to dose (taking the daily dose amount and dividing it by the number of times a day) and also prime the pumps. After a lot of testing, I sent it live today with AquaForest Component 123+ , the 4th channel is free at the moment.
In addition to dosing, the tank is now live with AquaForest Zeo, Carbon and Phos (had to go FaunaMarin on phos as the AF stuff is ludicrous expensive when you can only get the 5lt bucket) so will keep a close eye on it and see how things go.
Next step will be to clean up all the new wiring that is underneath as well as make up some cases for the various control boards.