I just recently found that my female Rhinogobius dropped her breeding tube, and the male started making nest for her to assess... Hopefully they'll lay eggs in a few days. The pH fluctuates throughout the day, as I dose co2, so it's about 7.4 before co2, and drops down to about 6.8 after it's been running for a while, and nitrates are about 20-30ppm. Given that, this fish clearly isn't picky about breeding... I think tds is at about ~400 last time I checked, but I'll test everything again once I get home, as most of this was from memory...
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