ive bought a fluval plus 3 filter for my tank and it has a control on top for airflow to come out, do i need this on or can i put the plug bit in top ? when i come home from work my water has turned a slightly brown colour, i think its off the mopani wood ive put in it, will it clear itself or do i need to put a polyester filter pad or carbon filter pad in to clear it ? ive not got any pads in filter yet just the foam cheers tony
There's no need to have air going into the tank via the filter, so feel free to plug it up! It is just as effective to make sure the water surface is disturbed by the filter's output (i.e. small waves are visible at the water's surface) as this ensures enough oxygen gets dissolved into the water. The staining from the Mopani wood will usually last for a couple of months (depending on your water-changing routine), so you can either live with it for this period or add carbon to the filter, which should remove it immediately (but make sure you change the carbon regularly as directed in the instructions - it has a nasty habit of releasing everything it's adsorbed back into the tank if left in for too long!)
think i'll put 1 in tonight to clear the tank abit. another thing (sorry for all the questions) ive bought some real plants for the tank and some of the are going yellow at the top, is this coz there dying ? ive heard you need plant food ?