bagu
Shouldn't you be looking to the right?
hey guys =]
question number 1
i have in my 20gallon a 3 stage inbuild rear chamber filter:
one 12inch sponge, that is 5 -6inches thick
one 4inch sponge, that is 5-6inches thick
ceramic rings
bioballs
carbon
filter floss
alongside that i have a UGF, the tank has gravel as a substrate
Thing is I love having 2 filters; i know you shouldn't leave the tank, but it gives me leeway for maintenance and also keeps the water crystal clear one also serves as a backup for the other. the tank is 6 months-7months old x] its also nicely planted with Co2 and ferts (liquid Co2 and tropica nutrition +)
what filter could replace the UGF if i changed to sand? something that is effective and wont destroy the tank with flow ^^
second question
where is the best place to buy sand? is it argos?
THANKS GUYS!
question number 1
i have in my 20gallon a 3 stage inbuild rear chamber filter:
one 12inch sponge, that is 5 -6inches thick
one 4inch sponge, that is 5-6inches thick
ceramic rings
bioballs
carbon
filter floss
alongside that i have a UGF, the tank has gravel as a substrate
Thing is I love having 2 filters; i know you shouldn't leave the tank, but it gives me leeway for maintenance and also keeps the water crystal clear one also serves as a backup for the other. the tank is 6 months-7months old x] its also nicely planted with Co2 and ferts (liquid Co2 and tropica nutrition +)
what filter could replace the UGF if i changed to sand? something that is effective and wont destroy the tank with flow ^^
second question
where is the best place to buy sand? is it argos?
THANKS GUYS!

The only concern is flow but im sure ill mod it somehow to lower the flow hehe 
/www.calgaryaquariumsociety.com/Arti...Bed_Filter.html
I've got fluvals in my tanks too and would recommend them,give out a bit of flow when maxed out but nice and quiet when you turn them right down (I turn mine down at night).I've got the two and three plus.