Hello everyone. I'm brand new to aquaponics and Im looking to start from my 70 gallon Fish tank in my rec room.
This tank has been up and healthy for over 8 years. My last shark just died from old age and now I only have a pleco left. I would like to add a small indoor garden growing lettuce mixes, arugula, romaine and spinach like stuff. I have read that the green leafy stuff will lower the nitrates naturally and reduce frequency of water changes and give me free-ish food.

So now I am slowly lowering the ph to around 6.8 and Im scouting for fish that will look pretty, be NON Aggressive, and thrive in a 6.8 ph and preferably like cooler water say 70-77F

Any suggestions?

Thanks up front
Dave From Canada