FrozenShivers
Member
Fluval do say it’s okay to 220 litres this filter though
Filter manufacturers generally overstate this. I have a few 207's - great filters but I would go 307 if you stay low tech and 407 if you go high tech. My 207 is on a 75 litre tank- less than half the volume of yours. Please try group up your replies into a single post otherwise it gets tedious to keep up with the thread. Hopefully things get better for your tank 🙂
Edit - Not well versed on your light, 75% may be a little high though especially without injected CO2 if you're using easy category plants. May be worth lowering it to 50-60% for the moment.
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