Awww shame I was going to say a heard of Geophagus and/or Satanoperca with a few Severums in there would look most excellent! Red Head Tapajo Geos and Red Neck Severums always look nice.
Wills
Wills
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Yes they are, there is plenty of light but there isn't enough CO2 (it's a common problem in big tanks) so we need to fix it. Swordplants need loads of Co2. And extra iron. We need to get used to fertilizing the tank far more often than the smaller one, and add liquid iron, too (Easy-life ferro), + the Co2 system is going to cost about 400€... But that's what we need to do.