Chiller flow rate

[jowy_ham]

Previously I'm running an Arctica 1/5 HP chiller (DBA-150) for my 3x2x2 tank with a Rena Filstar XP3 (flow rate of 1400L/hr or 350G/hr) and was quite satisfied with the results but recently I sold my 3x2x2, downgrade to a 1.5ft cube tank/

I intend to use the chiller for the 1.5ft cube (which is currently running on a Ehiem 2213 canister filter - flow rate 440L/hr) but I'm worry that having a too slow flow rate filter to push the water thru the chiller will result in tank water temperature might not in-sync with the chiller temperature thus result in more electricity used.

If I change to a higher flow rate filter (eg : use my Rena Filstar XP3 for 1.5ft cube), I'm worried that the flow rate is too strong for my fishes (boraras) and shrimps (cherry red shrimps).

Can anyone please advise ?

[uklau]

Are you going to have a densely planted tank? Are you using any CO2 reactor?

Lower flowrate causes water to move slowly through the chiller & that is going to bring down the temperature faster. The difference between the room temperature & the water temperature in the tank will determine how often it cuts in & off.

[jowy_ham]

Are you going to have a densely planted tank? Are you using any CO2 reactor?

Lower flowrate causes water to move slowly through the chiller & that is going to bring down the temperature faster. The difference between the room temperature & the water temperature in the tank will determine how often it cuts in & off.

Quite densely planted tank.

CO2 is introduce into the tank via a green cylinder with bioball inside type the 1 side connected to my canister output and 1 side to the rainbar.

I read somewhere that the chiller must be run by a pump/canister of the specified flow rate else it will not be efficient, is that true ?

As the temperature sensor is in the chiller, having a flow rate that is slower than specified, won't the temperature in the chiller go down too fast and thus the water temperature in the tank differs from that from the output of the chiller ?