Backyard Aquaponics
A place to discuss aquaponics

With temperatures rising daily the trout are heading for the grill and freezer.
Plants are going gangbusters.
I am guessing on about six to eight weeks, no fish, window before the next delivery of trout. As things cool down again.
I am adding Seasol and Iron supplements for the plants but would you suggest adding anything else? If so what quantities?

monitor your nitrates. If they start dropping too low you will probably need to alternate your Seasol & Iron with a liquid fertiliser with some N&P component. This will help to offset the lack of ammonia and nitrogen from fish and keep your bacteria ticking over - the effective nitrogen is often/usually urea which passes through the full bacteria process (the manufacturers label/notes should usually say).

A good Australian option is the Seasol Power feed - http://www.seasol.com.au/products/62/PowerFeed
It is good because the P is still quite low and you get N & K

You may have an equivalent, or else something like the US Seaweed extracts that include fish emulsion etc.