I have an Aquatlantis Nano Cube 30ltr aquarium which is currently running with its own internal filter with some guppies and amano shrimps. I am planning to reconstruct this aquarium to a full aquascape and to increase some space I am going to remove the internal filter. Since I am going for pressurized co2(still dont know if i go with an inline co2 diffuser or normal glass one) I am only considering a canister filter. I am also thinking of doing an inline heater to remove the heater from the tank. From a small research, I read a lot of positive reviews on eheim, mainly for reliabilty and silence when in operation and since this aquarium is in my bedroom a silent filter is a must. I am considering a classic 2211 or 2213. For plants I am thinking to go simple with a carpet of Eleocharis parvula and with moss on rocks and woods. The eheim 2211 has a max flow rate of 300lph and if I have 25litres of water the filter will circulate the water 12 times. The eheim 2213 has a flow rate of 440lph which circulates the water for >17 times. Do you think the I must go for the 2213 since I am adding an inline heater and it will decerease some flow, or it is still to much and better to go for the 2211? As regards to bioload I will have a trio pair of guppies with some cherry or amano shrimps and nerite snail.