I am new to this and I have read most of the topics. I just have a question about my filter the elite 15. I am getting hardly no readings on the ammonia front but is this due to filter cartridges? If so should I change them and place foam inside them instead? Also I have been cycling fishless since last saturday and should I change it to foam now? or is the filter ok for my tank. I have a 60 litre tropical tank.
Thanks
Thanks