bio media help! could it leach anything?

[milo24]

Hey guys so... i've seen some ceramic bio cube thingys on ebay which i'd like to put in the first chamber of my Evo but dont know if they'd be able to leach anything into the water possibly? ill add a link at the bottom if anyone wants to check them out, i think they look okay and i definitely prefer the price over other ones ive seen on the market. if no one thinks they could possibly be harmful for my tank ill get them.

i think im just weary due to the price being abount 1/3 of other similar ones on the market.


thanks in advance!

https://www.ebay.co.uk/itm/Bio-Filt...var=641766049701&_trksid=p2060353.m1438.l2649

 

[lapin]

Its ceramic media with no clue as to what materals are in it. Who knows????