Rena XP3 - Got one - what next?

[DeRo316]

Before you add any special media I would get a master freshwater test kit and test your water. If the fish you want need any special water conditions you can add media to your filter to condition the water in-line.

I would fill the bottom shelf with the black sponge that comes with it and some filter floss. In my 2nd shelf I put some bio-balls to give some bacteria a place to stay and a bag of carbon to remove the tannis from my driftwood. The top shelf has crushed coral to raise my ph.

 

[echoofformless]

Keep in mind though that if you decide to start playing with pH, hardness, etc only do it because you have very particular fish with very special needs. If you have a mix of different fish in a community tank, there is no need to do anthing drastic with your water parameters.

So unless you're keeping very hard or very soft water fish, just stick with extra biomedia.