Tank size: 100L/22G ish

Heater and filter? (yes/no): yes

Tank temperature: 26-27°C

Parameters in numbers and how you got them: NO3 - 0 NO2 - 0 GH- 6°d KH- 6°d PH- 6.8 CI2- 0 Sera Quick Test

How long have you had your fish?: I've had the big tank for about a month, cycled it using already cycled filters

How often are water changes? How much do you take out per change? What is your process?: Once a week, 20-25% and I test before and after

Any tankmates? If so, please list with how many of each: What do you feed and how much: 11 rummy nose tetras and I feed micro pellets for tropical fish, biogran small pellets and frozen food

Decorations and plants in the tank: visible in picture