Betta Fish: Pineconeing ?

My female betta to me appears to be pineconeing slighly 🙁 although im not sure if scales just lay like that shes my first. Shes also gravid i saw her releaseing eggs and eating them last night. No ammonia, no nitrite, low nitrate. Ph is higher than ideal at around 8 but its stable. Temp 25°C
Tank size: 35L
​has a Heater and filter
​The tank was started 4 months ago ive only had her for a month
​i do 25% water chnage once a week
​no tankmates other than snails, live plants.