OHF

[aroguy]

OHF, what thing I need to put in?
Cardon is it good for the water?

[Principal]

for me, 1 tray I put wool, 2nd tray I put ceremic ring, 3tray I put coral chip and forth tray , I put bi ball. I was told that carbon will puncture the aro head, so not advisable to put, unless u want to prove it.....

[rahimi]

for me, i put Bio ball & coral chips on the second tray, and for the first tray i put the biological wool. It working great. But this is just my suggestion. Hope it can give you an idea:thinking2:

[Principal]

How big is your tank bro?

[junaidi]

for my ohf, 1st tray, wool, 2nd tray CR, 3rd tray bacteria house

[GrandePunto]

For me 1st tray, wool, 2nd tray CR,n 3rd tray Bio mat or japan mat

[xXx]

my 1st tray wool for the 2nd and 3rd tray all bioring and CR wif jap mat on top off every tray