Backyard Aquaponics
A place to discuss aquaponics

Barney, Barney, Barney... you clearly haven't read enough posts if you think "too big" is language tolerated on this forum

As for the tank. Too much water helps stabilise temperature, ammonia spikes, nitrite spikes, salt levels etc.
All in all, the more water you have, the more time you have to react to a problem.

If you don't have enough grow beds to service all that water, that's ok, just 'Don't use' all the water. eg stock the tank as if it has less water.

Also, if you have a look around, there are very few ppl who have not 'grown' their system through a series of upgrades. A large tank will make upgrades much simpler for you.

Here's an alternative for you Barney... don't know the pricing... and it's a new product on the market...

Is a member up 1790 way that uses them... http://www.bundytanks.com.au/

Go to "Tanks Sizes & Styles"..... Select.... or scroll down to "Aquaponics"....

An "allinone".... tank and growbed.... might be limited in terms of expansion... but not a bad way to start... and great if you limited by space....