making the water RO with ivanacara in the tank

[martink]

i have ivanacara pair and they are laying eggs which are not hatching at 50ppm tds rainwater. I have a RO filter the cheap one and i was wondering how safe it is to slowly replace the tank water to pure RO and maybe some peat as well. will this kill the bacteria in my filter?

 

[MacZ]

It will not change anything. At best the TDS will go down by 20mg/l. You are already in such a low conductivity range that a two-digit shift down is not going to have any consequences.

Also in soft water it's less bacteria but rather archaea and yeasts that do the cycle in the filter (and on basically all surfaces in your tank).

 

[MacZ]

Oh and if you want to change the sourcewater to RO nonetheless: Just do it, the numbers are so close together there is no need to be as cautious as when switching from tap to RO.

 

[martink]

ok thanks