livingart

Sorry no idea on Waitematas water quality,
if you are keeping local marine fauna no need to alter salinity
my carpet sharks outgrew a 270 x 120 x 60cm in 2  years, having a circular enclosure means they can swim for a long time
yes 2hp will cover that size
 

That hasn't been my experience with them, they eat fish that have died usually
And only attempt to catch fish when not fed enough
 
 

No tropical ones availble but we have a local one but usually found in deeper water.

A Betta only lives 2 - 3 years so if you choose the biggest in the display, it is also possibly the oldest and may already be 12 months or more old.
How do you know it was over-feeding that killed the last one?
Bettas need a diet high in protein so live food is good or specially formulated fish food for bettas.
Here is a really good article about how much to feed your betta that should help you...
https://www.myaquariumclub.com/skinny-bettas-underfeeding-might-be-worse-than-overfeeding-19292.html

Easily. When you consider most of the fish is only fins there is not much body. 3 bristlenoses could easily eat all the evidence overnight. They are nocturnal so do their food foraging at night. Sorry you lost the fish but, as said in the other post, have you been testing your aquarium water?

I am happy to chat with any tortoise owners, just to share info, answer questions, help with setups and where to purchase tortoises from.... 

Made from an IBC intermediate bulk container.

 

So it turns out one of my old decorations (removed it from my tank a while ago to see if it was causing the mystery illness) has tiny holes in it and was actually hollow. It was sitting upright but has still somehow not drained completely.
So that's an exciting new source of contaminated water.
 
One option is to cut off the bottom centimeter so it drains freely, clean it out in the same way as the tanks and fill it with something so it's solid. Or just throw it away and figure out an alternative.

Made from an IBC intermediate bulk container.

 

Second tank is showing signs of infection.

For sale Leopard Geckos Born January 2023,
A -Tremper Albino,
B - Tremper Albino,Bold Stripe
C - Tremper Albino, Jungle
D - Chocolate Albino.
E - Chocolate Albino.
Open to offers.

For sale Leopard Geckos Born January 2023,
A -Tremper Albino,
B - Tremper Albino,Bold Stripe
C - Tremper Albino, Jungle
D - Chocolate Albino.
E - Chocolate Albino.
Open to offers.

From what I have researched any organic potting mix will be fine. Just make sure it is actually organic. 
Daltons Aquatic Mix is the most common dirt to use.

What you are proposing will definitely work, they are the best escape artists and finding their way into filters off limit areas etc.
Having access to 3D printer will help with tight fits on structure and support ledges on the walls to avoid collapses.
Can probably get away without heating and minnows make good tank mates
Search in the reptile/amphibian forum for some previous builds

We've changed and grown old, not just grown ?

The changes we need to make in our lives as we change and grow are something we never contemplate when starting on our journeys
Good luck

Well that didn't take long - turns out there's now a Hollywood Fish Farm in my area and a 21L tank followed me home somehow...

Love this and isn't it the truth.  Welcome back.

Cheers, old fella

It has been awhile since anyone has posted in this forum so away we go.
Bearded Dragons (Pogona vitticeps) 2023 breeding.
 

A little light reading LOL
Activities like pet shops, non-commercial domestic aquaponics, and ponds:
do not need a fish-farm licence do not need to be registered as a fish farmer. https://www.mpi.govt.nz/fishing-aquaculture/aquaculture-fish-and-shellfish-farming/setting-up-a-land-based-fish-farm/

Would still require a permit to sell which willinvolve proof of breeding etc.