1:- Zero Line Camera Module FFC Cable For Raspberry Pi Zero 5MP MIPI MOM New 2018 --------------------£3.63
2:- 12V/24V Color Peristaltic Dosing Pump Mini Water Pump For Fish Tank Aquarium ( 2.4's ) --------------£9.27
3:- Raspberry Pi Zero W Board 1GHz CPU 512MB RAM with Built-in WIFI & Bluetooth -------------------------£16.37
4:- 800x480 4" DIsplay Resistive Touch Screen HDMI LCD I/Os for Raspberry Pi ---------------------------------£29.81
5:- 16 Channel 12V Relay Shield Module Board for Arduino Raspberry Pi ARM AVR CN -------------------------£26.55
6:- 2pcs NTC Thermistor accuracy temperature sensor 10K 1% 3950 Waterproof Probe 1m ------------------£1.05
7:- HTU21D Temperature and Humidity Sensor Module Temperature Sensor Breakout ------------------------£1.64
8:- Liquid PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC for Arduino S ----------------------£10.67
9:- 1PC Recessed Magnetic Window/Door Contacts Security Alarm Switch Reed Adhesive --------------------£0.60
10:- Membrane 3x4 Matrix Keypad + extras - 3x4 --------------------------------------------------------------------£6.99
Obviously the magnetic switch is for a cabinet when aquired, and I still havent got an EC probe but plan to get one of these when I have a bit more cash.
https://www.robotshop.com/en/gravity-an ... meter.html
Also on the site I was getting the info from, they used 6 doser pumps? not sure why you would need 6 tbh - I would think 3 is plenty - base nute, ph down and one for possible ph up or B nute up.
I also need to consider a cabinet/mounting equipment for the screen, and pi system.