Originally Posted by coffeetwitch
im setting up a 125 gallon tank and planing on a fluval fx5 to start off and when i can, i will probably purchase a second one. i will be filling the baskets with bio filtration only... my question is this, i would like to use eheim substrat but somewhere i read that it may cause problems. the website never said another word about it... so what problems would it cause?
also, as i have not purchased the filter yet, im uncertain if the the eheim substrat will fall through the baskets. i know for a fact that it does fine in the 405 and 305 baskets. will anyone that has this set up care to chime in?
I use the Ehiem Substrat Pro in my Fluval 305 and it works great, with zero issue of it falling thru the baskets. I use it in all my filters (can, HOB
& intank) actually.
In my 305, I fill the bottom basket with poly-fil to catch gunk the sponges can't and it keeps the ESPro free of junk so the bacteria can develop/thrive better.