I keep my sa's at 86*f. If I go lower, to even 84* my L18 goes under driftwood and won't be seen from. As a result, I have heckelli that are around the 6" mark at 1yr. I was previously told they were slow growers, given they supposedly top at 8" , occasionally reaching 10".
My daughter has 3 juvi gt in her 75g. I need to take 1 out since a pair had formed there. I'll put him in my main tank and see what the growth differences are like.
Seems like there is ample science behind the increased temp theory however. I'm on my phone and can't link back to any articles atm as it is a ***** to do so .
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