The experiment with sticklebacks now over, having successfully bred and studied them, I have now cleaned the tanks and changed to tropicals again  (after a break of 35 years!).
Tanks are bought on the boot mkts and I make my own hoods from wood, using the latest compact low cost flourescent units. Power filters are reconditioned units fitted with extention tubes (home made) to circulate water better.  Living in Norfolk with tap water at 8 ph! I am limiting fish to those suited to hard water.As you can see, plant growth is prolific!Vallisinaria has grown to 3 ft in 2 months!!
I now have 1x3ft,1x18inch, and various small tanks includind a 24x8x8 which has been set up as the "hospital"  tank.The tanks were started with a few White cloud minnows, which now number 15, a pair of Dwarf honey gouramies 6 high fin l;eopard danios, 4 longfin zebra danios, 4 corydoras,2 hi-fin platies and a couple of guppies. I have set up a water but and cleaned the roof down, and hope to get some decent softer water in the near future. Photos taken with Olympus camedia C960 Zoom digital camera. No special settings, some with flash, set on HQ.