If chlorine is present (or has the potential to be present) and you do nothing to get rid of it then in my opinion you are foolish and potentially cruel. Why subject your rays to this for very little cost, just because they are not dieing doesn't mean they are not suffering.
I don't use water conditioner. I fill a 50 gallon barrel with tap water, aerate, heat and run a Fluval 205 filter full of carbon for a day and then do the water change. No problems and have had rays breed.
I have no chloramine in my water and chlorine will gas and dissipate within hours especially if the water is aerated. I use the carbon to remove any metals in the water. I don't think rays would be reproducing if they are stressed and suffering.
I don't use water conditioner. I fill a 50 gallon barrel with tap water, aerate, heat and run a Fluval 205 filter full of carbon for a day and then do the water change. No problems and have had rays breed.
I have no chloramine in my water and chlorine will gas and dissipate within hours especially if the water is aerated. I use the carbon to remove any metals in the water. I don't think rays would be reproducing if they are stressed and suffering.
2 hours to gas off....the damage is done in minutes. Rays have a very strong urge to breed, I think you could put pins in the eyes of a randy male and he would still do the deed.