um, Wow, i just finished, after 3 days of reading and skimming, completed all 43 pages of this.
What a fantastic tale of tragedy
and happiness.
With the size of the rocks this is probably not possible, but what about a large fry box, the kind of thing you would hang on the side fo a 'normal' tank and put babies, or a new fish into. could you not fasion something at least to keep the larger critters away from the babies and keep mommy and daddy in?