Safe aquarium weights
Iím new here so please be kind!
We have had a tank for a year or so and want to refresh it. We have built some Lego houses, using glue to keep all the bricks together.
The original plan was to use glass marbles to weight it down due to the buoyancy. This is ok, but these marbles are taking up a lot of space and not giving us much weight.
We thought of using lead, but unsure this is safe for the tank as it would need to be significantly more than just plant weights.
Each Lego house needs just over 500grams each.
Has anyone got any experience or ideas to make decent weights but keep our fish safe?
Thanks in advance.