right i did what i thought was best after reading all the advice. i have taken out the sand and replaced with gravel,and large stones ( the sand smelt like i was standing over a sewearge pipe) i have made the gravel 1 inch deep, so that i ensure thourough cleaning when doing a vac, the tank is now as clear as i would have liked it to be this morning, so what im doing now is going to squeeze one of my cycled filters ( the tests for this one are spot on,no3-10,no2-0,PH 6.8 no ammonia) im not sure where to squeeze it tho, do i just open the filter and squeeze into the cannister?? water flows upwards thru the cannister through,ceramic ring then bio balls,then course sponge then finer sponge,carbon and polishing pad--- so where do i squeeze?.. then as the water is clear now i wont feel compelled to do constant water changes so can let the filter get on and do what filters do, testing daily, please dont think i have gone against what everyone has said, i felt this would be the better way to go, and really hope you all agree, at the moment the readings on the tank in question are no3-10,no2-1.PH 6.8
i really appreciate all of your help
pic of the tank ,right after refilling,its much clearer now, the light is a temp mesure as my hood wont fit now with the external on there
~s~ xx