I have a tiny N. dubia that I bought along with the two same size hamata and aristo about two years ago. One hamata has over tripled in size, the aristo is growing, albiet slowly and the second hamata is also growing very slowly. But the dubia is growing the slowest. It appears healthy and pitchers well, just hasn't grown.
Is it normally a slow grower or does it take temps so much cooler than aristo does?
thanks in advance