Maybe try a timer on your tank light and have it turn off after 4-6 hours for an hour or 2, and then on again for 4-6 hours. Timers might be on sale now especially for Christmas lights, manual dial ones are around $5-6. There are reptile strip plug things which come with a timer for lights and all other stuff stays on too, I think from Zoo Med /this
Zoo Med Aquasun Controller: Lighting
Try that and try doing a little more often
pwc and also try to watch feeding too much.
An additional help might be getting this or similar product.
Seachem - PhosGuard
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New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?

Start here - Aquarium Advice Article
https://www.aquariumadvice.com/guide...ater-aquarium/
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