Scottm84
Aquarium Advice Activist
I'm still a little confused with a few things on bio filtration. I'm currently running a canister filter with rowa phos, carbon, filter sponge and seachem matrix. I have approx. 20kg of live rock in my 180litre tank but no deep sand bed. I did have really high nitrates but ever since I added the matrix to the canister they are right down to practically zero using an api test kit however I still have nuisance red hair type algae growing on my rocks so there must be some nitrates still present. Should I ditch the seachem matrix and leave it to my rock? Could removing the seachem matrix cause a crash? And would it still work with rock but no deep sand bed? I do 10% weekly changes and vacuum my sand. Any help and advice would be greatly appreciated