Grow Beds Arrive!

Big day today! Grow beds arrived so off to the garden supply to get besser blocks and sleepers. $$$ later, and enough material for 6 stands at home. Stands built, ready to plumb next weekend. I have decided to go with 2 yabby tanks under the grow beds, these will slow drain to about the 250lt mark and will help to "top up" the sump. I will also bury two 220 lt olive barrels and equalise them with the big sump, so total sump of almost 1500lt with an extra 500lt slowly topping it up (maybe even a float valve for this?). I will build a kiddie cover for the yabby tanks not too dissimilar to the sump cover and have the top removable.