Cycling Question

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#1
I have a 90 gallon tank that I'm setting up. My question is
can I add RO water to tank and then add salt to mix?
my water is in 4 different trash cans and I don't want to mix them Individually
 

ericta000

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#3
I have a 90 gallon tank that I'm setting up. My question is
can I add RO water to tank and then add salt to mix?
my water is in 4 different trash cans and I don't want to mix them Individually
That's what I done to all my tank. I never seem any ill effect from doing that
 
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#7
If there is no livestock, which it sounds like this is the case, I definitely don’t see any apparent negative effect. Dont recommend it when the tank is up and running with other livestock, such a rapid salinity change can create problems.
 
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#9
So the tank has dry rocks and dry sand in it no livestock.
should I add the salt to the sump return area or should I mix a 5-gallon buck of high salinity? and add it to the return area of the sump, let the return pump it to the DT?
 

All Delight

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#10
I would pre soak those dry rocks in rodi water. Most likely there is die off. You’ll see the water get a yellow hue after a few days. Better than your display tank water turning yellow.
 
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