Go ahead and start changing about 10-20% of the water every week or two. Ideally it is better to change smaller amounts of water frequently than it is to change large amounts of water infrequently. Try changing out 2-3 gallons every day for a week or two. Are you running any carbon? How many total gallons do you have?
You should easily be able to sustain 20-30 snails if not more between all of the tanks.
Is the turkey baster helping with feeding the pistol shrimp?
Has the pistol shrimp began to bond with the goby yet?
You'll have to post a pic some time of the two.
What is the resolution of the photos you posted earlier? If your photos are 300 dpi then they will display very big on a monitor. For displaying photos online make sure that your photos are 72 dpi. Just a thought. Hope this helps.
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