水草情迷

我個缸31.5吋x13.5吋x16.5吋,如果用Eheim 2213,2215,2217 邊隻適合D??

You have almost 120L of water. You should have one single 2250, or 2217x1+2215x1 if space is allowed. This is a must especially your tank is planted, 'cos probably you will connect the canister to a chiller that may deteriorate the water flow.

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24"x12"x14" w/ Eheim 2026+Arctica Mini
GLO T5HO 24Wx2
Lighting: 12:00pm-9:00pm
CO2: 2+ bubbles/sec
ADA Amazonia New

Simple rule of thumb is the filter pump should enable approx 10 times of your tank's volume per hour. That is a 50L tank need at a 500L/hour filter. And for your tank total flow should be 1200L per hour (adding up all pumps). Remember the measurement on the pump spec are assuming a flow without any height differences.

However if the height of the filter is far lower (more than 1 m) than the tank you should have more powerful pump to compensate for the loss of power pumping water upwards.

Also if you plant a lot of grasses, the flow volume should be higher. I'd prefer to buy a higher power pump when budget allows. you can re-arrange the water outlet direction (say to the surface) to avoid "storm" inside your tank.

Or if the budget is limit, while you have lots of plants, perhaps consider a submerged pump in some key area to prevent dead water. (the plants themselves are good "filtrates" already)

Hope that helps.