Just wanted to add that usually I have a huuuuge sunken plane in there but have taken it out at the minute to keep an eye on them all as i am having no end of problems with water and illnesses at moment, never had any in the 14 months it's been set up, have treated for everything over past few weeks, water is so cloudy, have done full water changes , partial water changes, u name it, I've probably done it and now so many of my fish have died.....all guppies. R.I.P really don't know what to do now.....it's like every day I lose 1 or 2...am at my wits end.
The fish have no obvious signs of disease, water very cloudy but have added Nutrafin Clear Fast 3 times over last week and no change at all!
Water Stats for the 150L Tank are....
NO3 Nitrate 10-25d
NO2 Nitrite 0
GH 6-16d
KH 0-3d
PH 6.8
Also the tank has Coral substrate a massive Aqua - One CF-1000 External Filter which have just rinsed out and added Carbon Chips and new filter wool to about 12 days ago. Hoovered Gravel, everything.......
Meds used so far: INTERPET Anti Internal Bacteria
INTERPET Anti Crustacean Parasite
INTERPET Fungus & Finrot Treatment
Also used 'AQUA SAFE' with any water changes I have done.