Java Fern

Don't worry. I am not about to start pouring things into my tanks I don't understand. I am much more likely to go low tech than high tech. Like throwing in a clam shell or something.
I have a hard enough time just convincing myself to raise the KH in the 30g which for some reason is almost zero. (I think this must be the turface in that tank)
 
I am really tending toward thinking it is the temperature. I have been moving a lot of things and I just raise the temperature from room about 68, less at night to about 78, even higher in one of the tanks. I will try lowering one in the next few days.
 
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