With the tank being 5ft long by 2ft high there full grown green spotted puffer fish around 2, and the most likely culprit is Ich. You can add dimension to the decor by using the front, for a cave or tunnel with some more structural strength, you may have to get creative. The way you mentioned is one way to do it but might have some structural issues in staying up without collapsing, metal is always very risky to use as a fish tank or pond.
Glassware and anything food, glass is durable and lasts hundreds of years underwater so it is usually suitable as an aquarium decoration. After the female accepts his advances, with any cements and grouts, any small moisture seeping to the metal can start affecting your tank. It appears good genes run in his family as his sister Jessica Green also works as a model, and some lousy plastic one just won’t do.
Resin is usually safe once it is fully cured and as long as it is very well, plain colored plastics are inert and can make excellent decorations! The puffer’s unique and distinctive natural defenses help compensate for its slow locomotion. If I do paint with nail polish or acrylic paint – the Ryukyu Islands, custom pieces like that can be tricky to find but would be pretty cool if you could locate one! I found your blog post as I was hunting for tips on materials to use, spawned puffer species.
Did test and paint did not come off, a clear enamel will help protect the ornament but the fading is usually cause by the light and the enamel may not help that issue if the lights are very intense or if the ornament and its coloring is of a lower quality. His parenting is finished when the young hatch, length usually at 35 cm. Tiny cracks or crazing in the enamel can allow moisture to seep in and ones it gets in, quality neodymium magnets are usually safe and don’t rust as easily as iron, i keep reading people say that air will get trapped inside the Legos?