I have had my fish tank for a few months and without really thinking I bought white gravel which is very course. It now has brown patches and I regularly syphon debris up and it still looks dirty. I want to change to a finer gravel of a more natural colour. Would I be able to do this in one day? If so, how?

Tank info:
35L Tropical
Real plants
8x Platinum Tetra
2x Ghost Shrimp

Thanks!



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