Right, I have just been to my local Pets at Home and bought myself a 5 in 1 aquarium testing kit which tests pH, Nitrite, Nitrate, Carbonate & General Hardness and have noted down the results. However, I have no idea what the optimum levels should be. And these are my results-
GH- 0-30
pH- 7-8
NO2- 3
NO3- 80
firstly you never explained to us exactly what seemd to be the probloem you wanted us to address.
if its the fact there are alot of nitrates in your water. Turtles are very messy animals, more than likely your filter is not being able to cope with
the strain these animals are putting on it.
Can you specify what filter you have,
tank size,
and the amount of turtles in that tank.
The amount you feed would also help.