Hi, This is my 180L Juwel tank i re-worked as a high tech tank in april this year. I'm still evolving the layout, but am pleased with the progress from Tropica and Eco complete substrates with adjusted EI dosing. This has been a worthwhile step-up from a 'mid tech' Dennerle system. The filter is an Ehiem 2076 with electronic flow control, which comes in handy to control my DIY surface skimmer. CO2 is pressurised 1 to 2 bubbles per second into 'flipper' diffuser and four 39W Linear T5 lamps, light the tank 10 hours a day. I made an auto top up control which helps with about half of the micronutrient dose, which is peri. pumped from an R.O. and fert. mix tank.